Automobile engine control sensor

The engine electronic control has been considered the MEMS technology in cars is one of the main application areas. Sensor is used in the engine control system the core of the automotive sensors, many types, including temperature Shaft Position Sensor, pressure sensors, position and speed sensors, flow sensors, gas concentration sensor and the knock sensor. Positioning Sensor to the engine electronic control unit provides information on the working conditions of the engine, the engine electronic control unit for the working conditions for precise control to increase engine power, reduced fuel consumption, reduced exhaust emissions and for fault detection.

Automotive Temperature sensors are used to detect the engine temperature

Automotive Temperature sensors are used to detect the engine temperature , suction gas temperature , cooling water temperature, fuel temperature and the catalyst temperature. Temperature sensor thermistor , RTD and thermocouple wire wound resistive three main types . These three types of sensors have their own characteristics , and its applications are also slightly different. Thermistor Crank Shaft Sensor with high sensitivity , response is good, but poor linearity , adapt to the temperature is lower. Among them, the general-purpose temperature range of -50 ℃ ~ 30 ℃, accuracy of 1.5% , a response time of 10 ms; high temperature of 600 ℃ ~ 1000 ℃, accuracy of 5% , the response time is 10ms; wirewound resistive temperature sensor accuracy is high, but the response characteristic difference ; thermocouple temperature sensor resistance , high precision measurement temperature range , but require treatment with the cold end amplifier together. Other practical products ferrite temperature sensor ( temperature range is -40 ℃ ~ 120 ℃, accuracy of 2.0% ) , metal or semiconductor film air Crankshaft Position Sensor( temperature range is -40 ℃ ~ 150 ℃, Accuracy of 2.0 %, 5% , the response time of about 20 ms) and so on.

Capacitive pressure sensors are used to detect a negative pressure, hydraulic, pneumatic, measuring range

More commonly used automotive pressure sensors are capacitive, piezoresistive, differential transformer, surface acoustic wave. Capacitive Position Sensor are used to detect negative pressure, hydraulic, pneumatic, measuring range 20kPa ~ 100kPa, which is characterized by high input energy, the dynamic response characteristics, and environmental adaptability; piezoresistive pressure sensor performance is affected by temperature greater need for a separate temperature compensation circuit, but adapted for mass production; differential transformer type pressure sensor has a larger output, easy digital output, but poor immunity; SAW pressure sensor is small, light weight , low power consumption, high reliability, high sensitivity, high resolution, digital output, etc., for automotive suction valve pressure detection, in a high temperature stably.

Non-contact temperature sensors can be used to measure the temperature of the temperature distribution inside

It can be used to measure the movement of objects, a small thermal capacity, a very rapid temperature change or a small target temperature of the surface of the object, but also can be used to measure the temperature distribution of the temperature inside. Measured object is saying there is no contact between the sensing element, so it also called non-contact Thermometer. Now the most frequently used non-contact thermometer Crank Position Sensors on the basic law of blackbody radiation work, known as the radiation thermometer tables. Radiation thermometry method has the following categories: colorimetric, radiation and brightness of the Act. The above method can only measure the temperature of the corresponding colorimetric, photometric radiation temperature and temperature. However, only about blackbody temperature measurement is the real temperature.
Non-contact temperature sensor Positioning Sensor temperature main advantages: For temperatures above 1800 ℃, generally using a non-contact temperature measurement method; its measurement limit is not affected by temperature sensing element temperature limits the degree of Therefore the highest temperature for the measurement, in principle, is not also limited; infrared technology is now becoming more and more well, and the radiation temperature gradually from the visible to the infrared to expand, until room temperature is lower than 700 ℃ of which can be measured, and and its resolution is very high.

Fire gas sensor is booming

Sensor technology in the fire , the fire gas sensor technology started late, but rapid development , especially in the field of early fire alarm fires become more and more attention of researchers and has developed various types of fire, gas sensors and smart , composite gas fire sensors. Currently, the fire continues to move gas sensor miniaturization , intelligent and multi-parameter , multi- criteria composite probing direction.With Cooling Temperature Sensor technology and application of new materials and the development of microelectronics technology , fire, gas sensors becoming smaller , miniaturization . Resistance using nanoparticles composed of gas with the surrounding environment changes and changes in the characteristics of nanomaterials can be made ​​gas sensors, toxic gases, flammable gas detection and quantitative measurement . Because nanomaterials crystal surface catalytic activity, as well as having a porous structure and other characteristics , the use of nano- crystalline film produced gas sensor has more choice and anti-interference, improving the accuracy of the fire alarm to reduce falsepositives.Meanwhile,thesmallsizeofnanomaterials,surface area is small , greatly reducing temperature , reducing power consumption, so that the fire gradually sophisticated gas Car Temperature Sensorminiaturization .Yin Nami , film and other new materials preparation technology successfully applied to the fire gas sensors and intelligent integration provides a good prerequisite. Fire gas sensor will make full use of micromechanical and microelectronic technology, computer technology , signal processing technology, circuits and systems , sensor technology, bionics , neural networks, fuzzy theory and other subjects on the basis of integrated technology to develop. Able to simultaneously monitor multiple gas developed automatic intelligent digital gas sensor , will be the next major development in this field .Fire is an extremely complex physical and chemical processes in different environments and different resultant fires burning material , such as gas composition , smoke particle size , temperature distribution and spectral composition are different , only one fire detection parameters vagaries the various types of fire is bound to have great difficulty , it may cause a false positive signal non-fire dust , water, gas , smoke, etc. do not have the real fire parameters . Therefore, multi-parameter , multi- composite fire detection criterion can not only overcome the single fire caused by false positives parameter , you can also identify the non-fire signaling leads to false positives , the future is still hot fire gas Engine Water Temperature Sensor . In addition, multi-parameter , multi- criterion composite gas fire detection sensor also allows to reduce the time to achieve early warning .

Using a pressure sensor should be noted some of the problems

Measured not only in the production of pressure sensors play an important role, also in real life pressure sensor applications are endless. Pressure sensors are widely automated measurement applications in the automotive market, the new changes almost every day, in fact, everywhere around us, on the road on a motorcycle has a pressure sensor shadow. In fact, the quality of the pressure sensor has been in production concern, in this regard only determines the production and testing department executive power, in fact, the real life of the sensor quality and the right to decide on the user's hand. Here it should be noted that the use of pressure sensors to make a summary of some of the issues. Pressure sensors work environment is generally more complicated, first of all we should prevent the waste deposited in the conduit and sensors with corrosive or hot media contacts. Measuring gas pressure in the pressure sensor, the pressure port should be opened in the flow line to the top, and Crankshaft Positioning Sensoris installed in the flow line to be fixed to the upper part so as to accumulate liquid flow easily into the pipe. Pressure sensors measure the fluid pressure, the pressure port should be opened in the side of the pipeline process, in order to avoid deposition of slag accumulation, this is to prevent blockage causes pressure Car Temperature Sensor measurement errors.Impulse control pressure sensor should be installed in temperature fluctuations small place, so as to make the sensor work more stable. Similarly in the measurement of fluid pressure sensor, the sensor should be installed to avoid the impact of the liquid in order to avoid overvoltage damage the sensor. Winter freezing occurs when Engine Water Temperature Sensor is installed outdoors freezing measures must be taken to avoid the impulse in the mouth due to icing fluid volume expansion, resulting in loss of the sensor.Pressure sensor wiring, should the cable through the waterproof connector or entangling pipe and tighten the nut tight seal to prevent leakage of rainwater into the transmitter through the cable housing to avoid line fault. Pressure sensor in the measurement of steam or other high temperature medium, the need to take additional buffer tube condenser, the operating temperature of the sensor should not exceed the limit, etc. These problems are in practice the need for technical staff are to pay special attention.

Compensate the acceleration sensor

The most common application acceleration sensor is used to detect the acceleration and direction of the phone, while the phone when it is only by standing gravity, so many people put the acceleration sensor function is also called gravity sensing capabilities. Acceleration sensor's strengths lie in the force measuring device. Yeah, but the device used to measure the position relative to the ground placed, then the accuracy is not high. Acceleration sensors can be used with a fixed reference coordinate system gravity, there is a linear or rotary motion tilting movement is limited, but a range of applications. Handle both linear and rotational movement, you need to put the acceleration sensor and a gyro sensor combination. If you want the device will not get lost in the movement direction, coupled with Shaft Position Sensor, a gyro, a magnetic sensor and an acceleration sensor is often used in conjunction with each other there is a mutual compensation between. Application of the magnetic sensor by measuring the magnetic flux electronic compass to determine the size direction. When Car Temperature Sensoris tilted, the geomagnetic flux through the magnetic sensor will change, so that the direction of the point of error. Therefore, if tilt correction without electronic compass, requiring users to horizontally. The Crankshaft Positioning Sensor can measure the angle of this principle, the tilt can be compensated electronic compass. In addition, GPS systems are three by 120 degrees by receiving satellite signals distribution finalize the object orientation. In some special occasions and landforms, such as tunnel, skyscrapers, jungles, GPS signals may be weak or even completely lost, which is called the dead. And through the installation of an acceleration sensor and a common inertial navigation sensors, the system can measure the dead zone. Time integral of the acceleration sensor, it becomes a change in speed per unit time, thereby measure the movement of the object in the dead zone.

MEMS sensors tracking system in motion a great development

Now widely applied MEMS technology sensors pressure sensors, acceleration sensors and gyroscopes, etc. MEMS sensors with a small, cheap, etc., is based on these factors, greatly expanded its field of application, a variety of consumer electronics, automotive electronics MEMS sensors on both the figure. In fact, MEMS sensors in motion tracking system is also a great development, and it can record the various states of human movement, in order to better analyze and develop the next phase of the training program. The athlete's daily training, MEMS sensors can be used for 3D human motion measurement, every action is recorded, the coaches on the results analysis, repeated comparisons to improve the athlete's performance. With the further development of MEMS technology, MEMS Coolant Temperature Sensor also with lower prices, which in the public gym can also be widely applied. Ski areas, 3D motion tracking of Crankshaft Positioning Sensor, acceleration sensors, gyroscopes and GPS enables users to obtain extremely precise observation, in addition to providing mobile data skis, you can also record the user's location and distance. The same is true in the surf, surfboard mounted on a 3D motion tracking, you can record wave height, speed, surfing time, pulp distance, temperature and calories burned and other information.

Sensitive sensor applications as well as the direction of development

Force sensor is used to detect gas, solid and liquid material interaction force sensors. Common materials are semiconductors, metals and synthetic materials. Currently used mainly silicon piezoresistive force-sensitive sensors and capacitive force-sensitive sensors. Advantages of silicon pressure sensors, the sensitivity, high precision, the disadvantage is affected by temperature. Prior to this, the domestic force sensor has not been possible in the industrial automation instruments, particularly transmitter product, there is a place. Force sensor in the domestic market is not large-scale open long been monopolized by foreign companies, mainly because of sensitive components and Coolant Temperature Sensor industrialization development ineffective inadequate attention, modest investment. Force Sensor industry, in addition to national policies, institutions, mechanisms, distribution, investment and other reasons, the force sensor itself also has industrial laws and technical issues worthy of study and research, which includes Camshaft Position Sensor of industrial technology, industrial of the market, industry conditions, industry professionals and other factors. Currently, the force-sensitive sensors are mainly used in industrial automation systems equipment manufacturing, mechatronics, scientific testing instruments and other equipment manufacturing industry, mainly related to process control pressure and flow parameters of the two detection, control and execution. With computer control, communications, networking and other technology development, information exchange communication sector is quickly covered field devices from the factory floor to the control, management at all levels. Centralized control of data processing platform has matured, network data acquisition sensors, the country is still embryonic. In force Car Temperature Sensor based on the technical development, enhance their level of information to form a digital, wireless, intelligent network capabilities of the new intelligent network force-sensitive sensors.

Silicon pressure sensor has some technical problems

Pressure sensors in automotive vehicles, barometers, medical equipment, wind control, air flow meter, respirators and ventilators, etc. silicon pressure Cooling Temperature Sensor are widely used. The temperature of the silicon Camshaft Position Sensor chip is very large, mainly affecting the zero and sensitivity drift generating root cause: In the production process, the composition of the four Wheatstone bridge resistance of the surface doping concentration and the diffusion resistance of the width can not be completely the same, so that the resistance of the four resistors are not exactly equal, the temperature coefficient not equal, resulting when the input pressure is 0, the bridge output is not 0, and the output changes with temperature drift, the zero temperature drift; thermal behavior of the semiconductor piezoresistive coefficient variation with temperature, causes the pressure sensitive drift with temperature. In addition, after the procedure and the glass chip static packaging, adhesives, silicone and cavity design will add temperature. In summary factors, packaged pressure sensor zero offset compensation includes calibration zero temperature drift compensation and sensitivity temperature compensation.

Interesting application of the pressure sensor effectively promote people sleep quality

Everyday life, due to various causes for the decline in the quality of sleep, affect people's quality of life and reduced efficiency. To this end, research and analysis concluded that the pressure sensor sleep quality for people to be able to analyze data and convert it into a suitable form of music, and promote sleep.
The pressure sensor on the mattress underground, due to pressure sensor with high sensitivity, occurs when people stand up, heartbeat and breathing-related action, the sensor will analyze this series of information to infer sleeping in a sleeping man what state, and then through analysis of Camshaft Positioning Sensor, the sensor signal obtained collecting heartbeat and breathing rhythm of sleep data, and finally all the data processing spectrum into a section of track, of course, a night's sleep you can be compressed into a few minutes of music.Sleep analysis is a natural-based applications. The source of inspiration for the development of the software before the college graduates in the development of a sleep state analysis service software, this software combines Positioning Sensors data analysis, creating this interesting and practical applications, but also will bring a lot of patients with insomnia Help.

Gas line profiles as well as the acceleration sensor works

At present, the linear acceleration sensor has dozens, most of them are solid substances as "quality testing" that is mass. The solid mass in a large impact (or high overload) condition will produce a strong inertial force root, which cause the sensor to lose the ability to work. Therefore, they are a big impact (or high overload) the application is limited occasions. In order to overcome the existing deficiencies of the linear acceleration Crankshaft Sensor, developed a new linear acceleration sensors. The sensor is a gas instead of a solid mass, thereby avoiding a large mass inertia force generated. This new line of other sensors, acceleration Crankshaft Sensors can not match with the characteristics of simple structure, low cost and high reliability, especially after impact by a high 1600ug still work. Heat rises, air conditioning decline, which is often seen in our daily life phenomena. For example, the still air burning candle, the flame temperature gas solid as the center of the presence of increased buoyancy, cold air constantly replenished from below, thus forming elongated flame, which is a natural air convection. Gas line acceleration Crank Shaft Sensor is the use of this phenomenon, the theory is based fluid mechanics "natural convection" theory. Natural convection Forced convection is a relative terms. Forced convection by fans, pumps, etc., causing fluid flow; natural convection speed in the absence of force, the fluid flow convection still it is a gravitational field acting on the fluid in the density gradient flow generated. Natural convection speed is generally much smaller than the speed of forced convection. Thus, the natural convection effect is often overlooked. However, under certain conditions, natural convection will play a decisive role. Gas formation conditions of natural convection is present gravitational field and the gas has a density gradient. In fact, in addition to gravity off, overload can also cause than the force of acceleration or when the natural flow. Gas line acceleration sensor is the use of acceleration overload caused by natural convection test line acceleration.

Introduction of negative pressure sensor

Pressure sensors are used to measure negative pressure or vacuum frequently encountered, frequent contact with negative pressure sensor will find generally negative pressure sensor measuring the maximum range is negative-100kpa or is-0.1MPA. But there are very few manufacturers say can be measured to-300kpa even lower. Here, I will explain the specific expression of negative pressure pressure sensor bar. In fact, this is the analysis of two different angles. Studied physics knows vacuum pressure-100kpa, so that the general pressure sensor measures the pressure is the lowest-100kpa is the basis of this, so the market is basically the lowest negative pressure Crank Sensor can measure-100kap, that - 300kpa Camshaft Sensor is how it happened? -300kpa fact not refer to atmospheric pressure, and physical stress on both a reference, you can understand, in a sealed box filled 300kpa high pressure gas, which sets stood a vacuum box, we put negative pressure sensor outside the big box to measure the pressure inside a small box, which would show a-300kpa, so that-300kpa pressure is produced. It is not with reference to atmospheric pressure. Understand this concept we chose negative pressure sensor can be helpful, so we do not choose the wrong pressure sensor, which is why we often help customers choose the pressure Car Sensors when the first use of the environment will ask him to ask his range how much. Only then will not choose the wrong pressure sensor.

Construction in the selection of the sensor should be noted that several elements

Intelligent building , usually used sensors from the following aspects:
First, test conditions : including measuring purposes, the physical characteristics of the test frequency width , measurement accuracy , the measurement time requirements. Followed by the performance of Engine Temp Sensor performance : include accuracy, stability , response speed, output, and the loading effect produced by the measured object , the correction cycle, an input terminal protection. Finally, we also according to the conditions of use : The main venues , including setting the environmental conditions , like temperature, humidity, vibration , etc., the measuring time and the required power capacity , connectivity with other devices , spare parts and repair services. In order to improve the measurement accuracy , usually normal display to about 50% of full scale to the selected measuring range ( or scale range ) . In short, the basic working principle of Crank Shaft Sensor should be starting , note the measured object possible load effect, the sensor selection should not only meet the requirements and low prices. The detection device as an intelligent building , the sensor is used correctly handle the sensor output characteristic line elements of and compensation issues , interference problems. Sensors in intelligent building intelligent building control systems play a decisive role , clever use only the correct sensor in intelligent buildings in order to give full play to their value.

How to choose a pressure sensor

Pressure sensors used more widely , to quickly and efficiently select the appropriate pressure sensor , the need for their application to do a comprehensive understanding of the following is selected pressure sensor to consider when some parameters. Select the type of pressure measurement : pressure measurements several categories , absolute pressure , gauge pressure measurements, true gauge pressure measurements, differential pressure measurement . Absolute pressure measurement , refer to the absolute pressure measurements, ie relative to the vacuum pressure measurement . Refers to a gauge pressure measured relative to atmospheric pressure measurement , the actual ambient atmospheric pressure changes , so some seal an atmospheric pressure sensor as a reference , the reference pressure is not sealed with the outside atmospheric pressure changes Therefore, such a seal a constant reference pressure Camshaft Position Sensor are usually referred to as true form pressure sensor . Differential pressure measurement , refers to the two different media to measure the pressure difference between , two pressure ports it needs to pass different pressure medium . 2 , select the appropriate pressure range and overload pressure range, the sensor pressure range is measured by the sensor pressure range , overload pressure is the pressure Crank Angle Sensor to ensure proper operation and can withstand the maximum pressure value , the general pressure sensor overvoltage capabilities are in the measurement range of 1.5 times. Pressure sensor range to be higher than the maximum pressure range of applications , but not too high, if you select the higher range of the sensor , the measurement range of Position Sensors output signal change is smaller, measuring accuracy deteriorates. 3 , select the appropriate pressure port, pressure port is to pass the path to the sensor medium pressure , the pressure interface material, usually ceramic , plastic, stainless steel , alloys, etc. , need to pressure medium without corrosive and choose different materials. At the same time the pressure interface also has a different shape , a shape and volume flush film formation , etc. If more viscous pressure medium , is recommended flush membrane interface, it is not likely to cause deposition of the media . 4 , select the appropriate electrical connection, electrical interface is a sensor with an external circuit or system data communication channel, which needs to be considered is the sensor type and size of the supply voltage , the output signal type and connection methods. If the sensor is not added to the signal conditioning circuit , the output of the sensors based on different systems have different output signals, such as a voltage signal in mV , and changes in capacitance or electric signals , then the customer must choose the design of the signal processing circuit , the signal conversion the useful signal can be identified . However, some sensors, the sensor unit after adding the signal conditioning circuit , the output of analog signals such as 0-5V ,4-20mA , etc., while some also add a digital conversion signal , such as output RS232, RS485 or PWM ( Pulse Width Modulation signal ) and so on. 5 , select the appropriate accuracy , different applications , the requirement of the measurement error is different , but the measurement accuracy is higher, the higher the cost of Crank Position Sensors is often Therefore applications, not one-sided with high precision .
6 , the temperature range selected sensor , the sensor usually changes with temperature drift , in order to achieve high-precision measurement , sensors usually have a temperature compensation function , the temperature compensation range , optimum measuring accuracy . In some high-temperature applications , because most of the electronic components can only work at 85 degrees or less , so you can choose not to bring the amplifier circuit temperature sensor will measure the signals from the high temperature zone and then diverted to the low temperature zone for signal processing .

Piezoresistive acceleration sensor is a widely used alternative DC response accelerometers

Piezoresistive acceleration sensor is a widely used alternative DC response accelerometers . Unlike capacitive acceleration sensor measuring acceleration by the change in capacitance , piezoresistive strain gauge type acceleration sensor value changes by the output acceleration signal , the strain resistance of the sensor inertial sensing system. Many engineers are familiar with strain gages , and know how to measure its output. Most of the piezoresistive sensors sensitive to temperature change , which requires its output signal is inside or outside the sensor for temperature compensation . Modern piezoresistive type acceleration sensor contains a specific integrated circuit to make the signal processing of the plate , but also contains temperature compensation. Piezoresistive accelerometer operating frequency up to 5000Hz. Many piezoresistive accelerometer or the use of air damping (MEMS -based ) , or using liquid damper ( paste type strain gauge ) . Damping characteristics are an important factor in selecting a sensor . Some applications , the input mechanical vibration frequency components included ( or excitation frequency response ) , with damping of the sensor itself can be prevented from ringing ( resonance ) , so as to preserve or increase the available dynamic range. Since the output of the piezoresistive acceleration sensor is purely resistive differential information is usually very good signal to noise ratio ; its dynamic range is only limited by the quality of the DC amplifier followed . For high acceleration shock test , some of the piezoresistive type acceleration sensor capable of measuring the acceleration beyond 10000g . Since a wide frequency response. Piezoresistive acceleration sensor suitable pulses crash test , in these tests are usually very high frequency and acceleration . Having a Engine Temp Sensor responsive to current through its acceleration output , the user can obtain no integration of velocity and displacement error information . Piezoresistive accelerometer typically used in automotive safety testing , weapons testing , seismic testing. Acceleration sensor is capable of measuring acceleration electronic equipment. Acceleration sensor / accelerometer / vibration sensors can be used to measure vibration, shock , speed, displacement and tilt . Beijing Sai Siwei Control Technology Co. Ltd. Precision Electronics -MEAS Engine Position Sensor Vibration / accelerometer segment as the vanguard force in the world , has been committed to the acceleration sensor / accelerometer and vibration sensors R & D and business development work , products widely used in the automotive, medical, military / aerospace , and consumer products and other fields , and has a silicon micromachined ( silicon piezoresistive ) , strain gauge and piezoelectric materials bound core technology . Product categories include: a piezoelectric acceleration Crank Shaft Sensor , piezoresistive accelerometer , three-axis acceleration sensor , mobile acceleration sensors, acceleration sensor chip.

Capacitive Accelerometer

Capacitance-type (with changes in acceleration caused by the change in capacitance sensing mass) acceleration sensor is the most common in today. Irreplaceable in certain areas, such as airbags, cell phones and other mobile devices. High yield and low cost makes such sensors. However, this low signal to noise ratio of the sensor is subject to a low, limited dynamic range. All capacitors type acceleration Crankshaft Position Sensor has an internal clock that (~ 500kHz) is an essential part of the detection circuit, the output signal due to leakage often be disturbed. The frequency of this noise is far higher than the measured signal frequency, generally will not affect the measurement result, but it is always and test signals superimposed. A built-in amplifier chip, which generally has a 3-wire (or 4-wire differential output) interface. DC power supply will be able to work as long as there is. Capacitance type acceleration sensor working bandwidth is generally limited to a few hundred Hz, partly because of its internal structure with a large and heavy air damping. Capacitance type acceleration sensor suitable for measuring low-range acceleration, the upper limit is generally less than 100g. In addition to these limitations, modern capacitance type acceleration Motor Position Sensor, in particular a level meter of the device, with good linearity and high stability. Capacitive acceleration sensor is usually appropriate onboard test, low cost is a factor. For low-frequency exercise test, acceleration generally low, they are an ideal choice. Such as civil engineering vibration testing.

Insomnia patients with the Gospel: a pressure sensor to promote sleep

Sleepless nights, not only bad for health, but also affect people's quality of life and reduced efficiency. Usually, many people choose medications to control, but the "three-drug" will produce between the invisible health hazard. And after researchers demonstrated that the pressure sensor can be converted into a suitable form of music, for the promotion of sleep is relatively good. Pressure sensors capable not promote sleep, we just put the mattress underground pressure sensors, pressure sensors have high sensitivity because when people stand up occurs, the heartbeat and breathing-related action, Position Sensor will analyze this series of information to infer sleep What people in a state of sleep. Then through the analysis of the sensor, Crank Shaft Sensorsignal obtained collecting heartbeat and breathing rhythm of sleep data, and finally all the data processing spectrum into a section of track, of course, a night's sleep you can be compressed into a few minutes of music. There are many people in the study of sleep analysis, sleep analysis is a natural-based applications. We will pressure sensor combined with this program we will be able to understand the situation of sleep, in-depth analysis of such information we will be able to find the causes of insomnia, which effectively relieve insomnia.

For sensors recognize small misunderstanding

Sensor type is very large, we usually use the knife in the type of sensor is a lot , in fact, the sensor is of some small errors . Gyro inertial space is used to measure the relative rotation of the carrier or the navigation, guidance in the exercise as a part of the control vector . Cell phone use a micro silicon gyroscope gyro , this gyro integration is very good, but the most important is the price is very cheap, but its drawback is that accuracy is not high . In practice , if used for accurate navigation , guidance , the need for very complex and compensation solver . As for the game , mobile phone use, generally using a two -axis gyroscope , less precision . Gravity sensing Crank Shaft Sensoris a two -axis accelerometer , through the attitude matrix , solves for the horizontal position. Therefore, through it can calculate the approximate angle of inclination relative to the horizontal plane and so on . The above-mentioned acceleration sensor is an accelerometer , although it is known as the acceleration sensor , but in fact it can not directly measure the acceleration measured is "specific strength" , by comparing the force equation , can calculate the acceleration . After integration , you can calculate the speed , and then after integration , can be calculated from the hotel. But must use two -axis accelerometer or triaxial accelerometer to measure the horizontal plane , which is an acceleration sensor to be used in combination in order to measure the horizontal plane . Daily phone call is actually two -axis acceleration sensor or accelerometer triaxial accelerometer . Gravity acceleration Engine Temp Sensor is a sensor only; gravity sensor values ​​units are generally tend to describe g = 9.81m/s2 ; while m/s2 acceleration sensors are generally used to describe directly ; but in actual use for more intuitive measure of magnitude of the acceleration , normal discourse also measured in g ; no matter what is measured in units , there is no fundamental change in Engine Temperature Sensors, that is to use micro voltage value converted into the corresponding numerical description can continue to use a unit . In the selection of gyroscope, accelerometer sensor , accelerometer, gravity sensor, we can be resolved with reference to the above , but the above is approximate and contact said some differences in the actual use of the process is not very clear if we choose , we can consult the sensor manufacturers and technical personnel to choose, in order to avoid wrong .

The basic form of the sensor waterproof what

Sensor is very broad range of applications , in many electronic devices have applications above , there are also single use , the sensor in the course will encounter many problems, such as in wet and even underwater use , use in these environments will may use waterproof -type sensor , then the basic form of sensor waterproof everyone know .Many sensors , such as Engine Cooling Temperature Sensor, pressure sensors , etc., and even ultrasonic sensors are likely to use in a water environment, the market now there are two cases, one of the front-end waterproof A full waterproof type , waterproof front plug-in general , such as plug-in temperature sensor , pressure sensor, and screw , such that the front end can be inserted into the water -based waterproof effect, and the second half can not be sunk in the water , followed by the output signal place or a place where wiring is not water. Another is fully waterproof type, this general type are input , such as input type liquid level Engine Temperature Sensors, pressure sensors , etc., this type of sensor is completely waterproof sunk in the water are completely waterproof , but it kinds of prices are generally expensive , it is generally in front of customers are purchasing a ready- front waterproof type .

Waterproof design of the sensor is generally divided into two kinds , one is sealed design

Waterproof sensor design is generally divided into two types, one is a sealed design is completely sealed in the production of a Motor Position Sensor, in any place of the interface are sealed , there is a material that is waterproof , of course, this not with popularity , are generally still sealed design . Waterproof sensors fairly wide range of applications , but also has a great application prospects , customers now purchase generally require a good waterproof , waterproof sensors because the general price and the price difference between ordinary sensor , so the manufacturer in the production process in general will have a waterproof rating. Now the water level Engine Position Sensor is generally not high, unless special requirements of customers , but also can be applied in many cases, if a customer purchases the sensor when the sensor must explain waterproof , or explain their use of the environment

The basic form of the sensor waterproof what

Sensor is very broad range of applications , in many electronic devices have applications above , there are also single use , the sensor in the course will encounter many problems, such as in wet and even underwater use , use in these environments will may use waterproof -type sensor , then the basic form of sensor waterproof everyone know .Many sensors , such as Crank Shaft Sensor, pressure sensors , etc., and even ultrasonic sensors are likely to use in a water environment, the market now there are two cases, one of the front-end waterproof A full waterproof type , waterproof front plug-in general , such as plug-in temperature sensor , pressure sensor, and screw , such that the front end can be inserted into the water -based waterproof effect, and the second half can not be sunk in the water , followed by the output signal place or a place where wiring is not water. Another is fully waterproof type, this general type are input , such as input type liquid level sensors, pressure sensors , etc., this type of sensor is completely waterproof sunk in the water are completely waterproof , but it kinds of prices are generally expensive , it is generally in front of customers are purchasing a ready- front waterproof type .Waterproof sensor design is generally divided into two types, one is a sealed design is completely sealed in the production of a Position Sensor , in any place of the interface are sealed , there is a material that is waterproof , of course, this not with popularity , are generally still sealed design .Waterproof sensors fairly wide range of applications , but also has a great application prospects , customers now purchase generally require a good waterproof , waterproof sensors because the general price and the price difference between Crankshaft Sensor , so the manufacturer in the production process in general will have a waterproof rating. Now the water level sensor is generally not high, unless special requirements of customers , but also can be applied in many cases, if a customer purchases the sensor when the sensor must explain waterproof , or explain their use of the environment .

The difference between sensor and transmitter

Transmitters and sensors used are very broad , transmitters and sensorsclassification is varied , in fact, transmitters and sensors were also very large .The difference between the transmitter and sensorBy the requirement that the sensor is able to be measured and according to certain rules to convert the output signal of the device or devices in general , usually sensitive components and conversion components . When Crankshaft Position Sensor output signal to the required standard , then known as the transmitter.The concept of a non-standard transmitter signals into standard electrical signal instruments, sensors sucked physical signals into electrical signals of the device, used to say physical signals , and now other signals also. An instrument refers to the on-site measuring instruments or base control table , the second instrument signal refers to the use of a table to complete other functions: such as control , display and other functions of the instrument.The sensor and transmitter are thermal instrumentation concept. Sensors are the non-electric quantities such as temperature , pressure, level , material , gas characteristics into electrical signals or physical quantities such as the pressure, level , etc. directly to the transmitter. Transmitter is Crank Shaft Position Sensor to the weak signal amplification in order to transfer or start control components. Or to the non-power sensor input into electrical signals while amplifying remote measurement and control in order for the signal source. According to the analog can be converted into a digital value. Together constitute a sensor and transmitter control monitor signal source. Require different quantities of different sensors and the corresponding transmitter. There is also a transmitter is not a physical quantity into an electric signal , such as A boiler water level of the " pressure transmitter " he is to the lower levelAutomobile sensor in the water and steam condensate water through the upper portion of the instrument tube to the the transmitter side bellows , the bellows side of the differential to drive the mechanical amplification means a pointer indicating a distance meter level . Of course, there are quantitative replaced the electrical simulation can also be called the digital transmitter. These are just a conceptual description of the difference between the sensor and transmitter .

Torque sensor has gone through three stages

Torque sensor development has come a torque sensor development has gone a long time, the torque sensor performance is getting better , in fact, torque sensors can be divided into three stages, namely measurement technology generation, the first rotation torque sensors birth and modern torque sensor .The historical evolution of torque measurement technology , beginning in 1678 . In that year, Robert Hooke Hooke's law describes the well-known materials and related materials extending proportional relationship between tension . Bridge circuit , and the Hunter- Christie , the smallest change in voltage can be measured . However, the name of the inventor to switch second Wheatstone , the actual fame belongs Heng Teke view .The first rotary torque sensors and Positioning Sensor measurement system in 1945 on the market it is based on the principle that if the bottom of the axial load torque , reversing an angle proportional to the torque . This angle measuring system can measure the angle .Modern torque sensors typically have an analog signal output. In these interfaces , the power module and the adjacent interference drive is possible, especially in the case in the past for the long feed lines and high dynamic , increasing the level of the sensor signal , the signal level of ± 5V and / or typically ± 10V.However, in many applications, anti-interference ability is not enough. The solution is a digital electronic sensors . Modern torque Crankshaft Sensor Replacement, integrated electronics in the area of ​​the shaft , the above diameter reduction , is applied to the rotating part of the rotary transformer and the axis of rotation electron attachment .Torque sensor technology is still rapidly developing , believe that with the development of sensor technology , the torque sensor performance will also be further improved. Will further expand its scope of application .

Bimetal temperature sensor structure

Bimetallic temperature sensor is the use of a bimetal made ​​of a temperature characteristic of temperature sensors, such as cold start timer switch, which consists of housing, bimetal, heating coils, contacts and the like.
Cold start time switch is a temperature-time switch with threaded connections installed at the outlet of the engine, in order to detect the engine coolant temperature. This switch has a normally closed contact inside its movable arm by a pair of sheet metal. Bimetal Crank Shaft Sensor expansion coefficient from the two different pieces of metal bonded, as the temperature changes, the two thermal expansion difference between the metal sheet, the temperature is low, the bimetal to maintain the original state; temperature rises to a certain extent when the bimetal to the low thermal expansion coefficient of the metal sheet is bent. Bimetal around which two heating coils, heating the bimetal can bend, so the contacts open. Warm up the engine to a certain temperature, the original closed contact should be disconnected.

Thermistor temperature sensor ferrite

Thermistor temperature sensor ferrite(1) Structure thermistor temperature sensor from the shell ferrite, ferrite, the reed switch and a permanent magnet, and the like. Magnetic reed switch in the circuit configuration of two annular permanent magnets and ferrite. The use of ferrite magnetic properties with drastic temperature changes, so that the reed switch is turned on or off. SuchCrank Position Sensor are generally used to control the electric car radiator fan and hydraulic lights.(2) WorkThermal ferrite is a ferromagnetic material, when more than a certain temperature, the permeability of the ferrite sharply, which has a ferromagnetic body from the paramagnetic (weakly magnetic) rapidly changing nature of such abrupt changes in temperature called the Curie temperature. Curie features you can make use of the reed switch is turned on or off.Need to use different sintering material composition and heat treatment methods available in different Curie temperatures. For example, to control the engine cooling water temperature is maintained at 65 to 100%: between two ferrite when the Curie temperatures of 100 ℃, 65 ℃, the corresponding temperature range of the magnetic field strength becomes the form shown in Figure 2-6 shows the flux ring.When the ambient temperature is lower than the thermal ferrite 65 ℃, the two ferrite ferromagnetic material magnetized by the permanent magnet, and with the formation of a magnet and reed switch the contacts of the magnetic field lines through a through and produce suction, so that contact is closed, as shown in Figure 2-6a. When the ambient temperature is higher than the thermal ferrite 100 ℃, two ferrite permeability sharply, into a normally magnetic material is not substantially sensitive magnetized ferrite, ferrite exists no equivalent . Magnetic field of the permanent magnet, the reed switch contacts and generate a magnetic field lines through the suction, the contact is closed, as shown in Figure 2-6c. When the ambient temperature sensitive ferrite 65 ~ 100 ℃ in between, wherein a Curie temperature of 65 ℃ ferrite magnetic material into a normally is not magnetized, and 100 ℃ becomes ferromagnetic ferrite body which is magnetized and the permanent magnet is formed with the left one magnet. Then
Reed switch lines through the contacts and generates a magnetic repulsive force, the contact opens

The important role of the pressure sensor

Mold manufacturers can take advantage of the pressure sensor on the upcoming delivery of the mold tryout strictly to the mold design and processing improvements. Products molding process can tryout for the first time or the second tryout basis set and optimized. The optimization of the process that can be used directly after each sub-test mode, thereby reducing the number of times the test mode. With the completion of the tryout, not only to make the mold reached the quality requirements, but also to make a mold manufacturers gained a proven process data. These data will be delivered as part of the mold to molder. Thus, mold manufacturers provide molders than just a mold, but mold and fit this mold process parameters composite together a solution. Such programs provide mold and simple compared to its intrinsic value has improved. Not only greatly reduce the cost tryout, but also shorten the time of tryout.
In the past, molding manufacturers in the report by its users filling of the mold often appears bad, the key size is not correct such problems, because no way of knowing the state of the plastic in the mold, they can only be based on experience to speculate on cause of the problem, thus will not only make detours, and sometimes can not completely solve the problem. And now they just molders from the pressure Engine Water Temperature Sensor according to the information gathered about the plastic in the mold status information (Figure 4) were analyzed, we can accurately determine the crux of problem.
Although not a mold is required for each pressure sensor, but each set of molds are available from the pressure sensor benefit from the information provided. Therefore, all molders should understand the pressure sensor in the injection mold optimization plays an important role. Those who believe the pressure sensor for use in the manufacture of precision molds play a key role in mold manufacturers can make their users more quickly produce products that meet the quality requirements, but also can promote their mold design and manufacturing techniques improved.

Temperature sensors and instrumentation used in conjunction with how

Temperature sensors and instrumentation with how to use ? Everyone knows sensor for measuring temperature right , that is a temperature sensor , and its use is very wide, and also , and instrumentation used in conjunction. Using the temperature sensor with the instrument has many advantages , first of all, the temperature sensor is used with the instrument can be a good read temperature value , although there are several significant type temperature sensor can also be produced directly read the number , but with the reading of the instrument easier to use , especially in the about the installation space is limited you can directly drop sensor wire bonding meter readings , and secondly, the sensor can also make use of the instrument with the instrument using the sensor signal changes , the use of the instrument function can output various signals, such as digital signals, analog signals , digital signals , etc. Finally , the sensor can combine a good instrument to use integrated temperature sensor , so that a plurality of temperature sensor reading is displayed on a meter , more convenient to observe and record. Today , not only the temperature sensor is often used in combination with the meter , a pressure sensor , a displacement sensor so often used in conjunction with the instrument to better measurement , along with the development of Positioning Sensor and instruments ,Engine Coolant Temperature Sensor with the use of the instrument will be more and more common case . Using the temperature sensor with the instrument has many advantages , first of all, the temperature sensor is used with the instrument can be a good read temperature value , although there are several significant type temperature sensor can also be produced directly read the number , but with the reading of the instrument easier to use , especially in the about the installation space is limited you can directly drop sensor wire bonding meter readings , and secondly, the sensor can also make use of the instrument with the instrument using the sensor signal changes , the use of the instrument function can output various signals, such as digital signals, analog signals , digital signals , etc. Finally , the sensor can combine a good instrument to use integrated temperature sensor , so that a plurality of temperature sensor reading is displayed on a meter , more convenient to observe and record. Today , not only the temperature sensor is often used in combination with the meter , a pressure sensor , a displacement sensor so often used in conjunction with the instrument to better measurement , along with the development of sensors and instruments , sensors with the use of the instrument will be more and more common case .

CNC requirements of the sensor

CNC requirements of the sensor (1) high reliability and strong anti-interference; (2) meet the requirements of accuracy and speed; 3) easy maintenance, suitable for machine tool operating environment; (4) low cost. Different types of CNC machine tools on Cooling Temp Sensor requirements are not the same, in general, large machine tools requires high speed response, medium, and high-precision CNC machine tools to the required accuracy based.

Sensor design applications on CNC machine tools

Sensors are required to be measured can feel, and according to certain rules to convert the output signal of the device or devices, the input signal (to be measured) often non-power, the output signal of the electricity always for easy handling, such as voltage. Because high-precision, high speed, high efficiency and safe and reliable, in manufacturing Crankshaft Position Sensor and equipment updates, CNC machine tools are rapidly gaining popularity in the enterprise. CNC machine is an automated process control system with the machine, according to pre-programmed procedures, so that the machine movements and machined parts. It combines mechanical, automation, computer, measurement, microelectronics and other latest technology, using a variety of sensors.

How long can the displacement sensor life

We live in an age of advanced science and technology, should be carried out in various fields necessary for detection and analysis. Displacement Crank Shaft Sensor applications are increasingly widespread. That how to make it last longer displacement sensor? Both methods are based on the piezoelectric power generator, a micro-electromechanical systems (MEMS) cantilever converted into electrical energy to mechanical motion, and the motion of the cantilever can be driven in different ways. One is with a radioisotope, and another vibration collected with the environment. All self-powered communication nodes must maintain their memory state, periodically send its status. This requires 0.1 microwatts to 1 milliwatt of power.Cornell University researchers with a small amount of nickel -63 (Ni-63) to join its radioisotope neutrons in the nucleus made ​​of a piezoelectric generator. It can be a beta particle radiation harmless to maintain every 3 minutes 5mW RF pulses. Up to 100 years of its life.Netherlands an Imac nanoelectronics research center created a wireless, autonomous temperature sensor. Nitrogen compound aluminum vibration collector. Displacement vibration energy collected by Crankshaft Sensor Replacement generally require a specific vibration frequency of 1 micron. The sensor can measure the temperature every 15 seconds, and the data to the base station of more than 15 m. However, the sensor can not be packaged under atmospheric pressure, vacuum packaging in order to be up to 85 micro watts.

For sensors recognize small misunderstanding

Sensor type is very large, we usually use the knife in the type of sensor is a lot , in fact, the sensor is of some small errors .Gyro inertial space is used to measure the relative rotation of the carrier or the navigation, guidance in the exercise as a part of the control vector . Cell phone use a micro silicon gyroscope gyro , this gyro integration is very good, but the most important is the price is very cheap, but its drawback is that accuracy is not high . In practice , if used for accurate navigation , guidance , the need for very complex and compensation solver . As for the game , mobile phone use, generally using a two -axis gyroscope , less precision . Gravity sensing Positioning Sensor is a two -axis accelerometer , through the attitude matrix , solves for the horizontal position. Therefore, through it can calculate the approximate angle of inclination relative to the horizontal plane and so on . The above-mentioned acceleration sensor is an accelerometer , although it is known as the acceleration Engine Coolant Temperature Sensor  , but in fact it can not directly measure the acceleration measured is "specific strength" , by comparing the force equation , can calculate the acceleration . After integration , you can calculate the speed , and then after integration , can be calculated from the hotel. But must use two -axis accelerometer or triaxial accelerometer to measure the horizontal plane , which is an acceleration Engine Position Sensor to be used in combination in order to measure the horizontal plane . Daily phone call is actually two -axis acceleration sensor or accelerometer triaxial accelerometer . Gravity acceleration sensor is a sensor only; gravity sensor values ​​units are generally tend to describe g = 9.81m/s2 ; while m/s2 acceleration sensors are generally used to describe directly ; but in actual use for more intuitive measure of magnitude of the acceleration , normal discourse also measured in g ; no matter what is measured in units , there is no fundamental change in the sensor , that is to use micro voltage value converted into the corresponding numerical description can continue to use a unit . In the selection of gyroscope, accelerometer sensor , accelerometer, gravity sensor, we can be resolved with reference to the above , but the above is approximate and contact said some differences in the actual use of the process is not very clear if we choose , we can consult the sensor manufacturers and technical personnel to choose, in order to avoid wrong .

The function of throttle position sensor

Various types of automotive throttleEngine Cooling Temperature Sensor (Throttle Position Sensor, TPS) are mounted on the throttle shaft in the throttle body at one end , and its function is the throttle valve opening degree (i.e., the engine load) into an electrical signal input after size ECU , ECU according to the throttle position signal discriminating engine operating conditions , such as idling condition , part-load conditions, such as high load conditions , and according to different engine operating conditions on the concentration of the mixture needs to control fuel injection time . In the electronically controlled automatic transmission equipped with a car , TPS input signal in addition to the engine ECU , the transmission electronic control unit are also entered (ECT. ECU), for determining the transmission shift timing and the timing of the main converter lockup signal a .

Ultrasonic level sensors

In the top of the silo facing material surface with ultrasonic generator and receiver. Generators emit ultrasonic shot through the air to the material surface layer after being reflected, in part reflected by the Receiver, ultrasonic transmitter to the receiver by the elapsed time can be calculated by multiplying the speed of sound material level height. As the air temperature will affect the level of the acoustic propagation velocity, so the need to measure the air temperature to correct the speed of sound.Ultrasonic Crank Shaft Position Sensor suitable for measuring particle size larger block material material level

Nuclear radiation material level sensor

Radioactive Co-60 (half-life of 5.26 years) and Cs-137 (half-life of 32.2 years) emitted g rays can penetrate the walls of the container and container materials. In the lower side of the silo with g-ray receivers, along with material surface height variations, g-ray intensity after Engine Temp Sensor through the material layer is different, the receiver detects the incoming g-ray intensity and through the material level indicator shows height.This is a non-contact measurement method, without damage to the container perforated containers, dangerous goods, and it is suitable for harsh environments such as high temperature and pressure measurements. g-rays harmful effects on the human body is certainly there, but for the limited doses, there is no danger under the proper protection.

Hammer-type material level sensor

Hammer-type material level sensor consists of a servo motor, hanging rope hammer, level transmitter unit and a display instrument with a microcomputer composed. After starting the computer issued a drop hammer signal, the servo motor turning down the hammer, when the hammer hit the material surface, the sender sends a signal to the computer, stop the hammer hammer down and send up the signal, the servo motor reversing the heavy hammer rise and value of the signal sent to the display material level meter. Hammer rose to the top position after the motor stops, after a delay and then repeat the above action. There are material level indicator, the lower limit alarm signaling and other devices. Hammer-type material level Crank Shaft Sensor  resolves within a certain range of measurement problems, typical measurement range up to 60m, and this measurement and steam, dust has nothing to do with high accuracy.

Material level sensor and its application in thermal power plants

Level measurement is a level measurement in a branch. Level is the storage container or the liquid in the industrial production equipment, powder, granular solid, location of the interface between the gas, depending on the purpose divided liquid level, interface level and material level Crank Shaft Position Sensor . At present, China mainly coal as fuel for power generation, most of the coal power plant boilers are used to feed the boiler. For direct firing boiler feed, coal bunker material level and low relationship to the boiler as well as power generation system can operate normally. Coal Hoppers overfill overflow, causing an accident to take coal; coal bunker material level is too low or emptying may cause unstable combustion or even stop the big fire accident. For storage type boiler feed, both coal bunker, another bunker, bunker pink bits control is particularly important. Silo is a transit point for fuel, coal is transmitted through the air, heat the gas in the coal into the coal bunker there is a certain "base temperature", usually around 70 ° C, and its role is to make coal there are certain discrete. However, Engine Cooling Temperature Sensor in the coal moisture absorption was rapid evaporation of the water discharge pipe positions, the coal will become dry, which is easily pulverized coal collector, the collector of the end result is burning. Burning intensified even warehouses around the collector, again and again, a vicious cycle, so as not timely effective control, the outcome will be a large number of coal burned in vain. According to the information reported spontaneous combustion of pulverized coal power generation accounts for about 0.5% of the total amount of coal around. In addition, the coal bunker coal dust explosion greater loss over the years, coal bunker coal dust explosion accidents often occur, causing huge losses to the thermal power plant. Currently, the most economical and most suitable way is through a reliable level sensor for coal bunker coal bits and pink-bit monitor, it is always in the best transit appropriate control state, which is the primary thermal power generating units to ensure safe operation.

Infrared Sensors

Various elements of the infrared sensor using a specific wavelength of the absorption principle ,Engine Temp Sensor having a good anti-toxic response, and a response in the majority of hydrocarbons . But the structure is complicated and costly .

Buddha Galvani cell type oxygen sensor

Diaphragm Buddha Galvani battery type oxygen sensor structure: in a plastic container on one side with a good oxygen permeability , thickness 10 ~ 30μm PTFE breathable membrane inside its container tightly stuck in precious metals ( platinum , gold, silver, etc. ) cathode electrode , the other side of the inside of the container or container blank part of the formation of the anode ( the use of lead , cadmium and other large metal ionization tendency ) . With potassium hydroxide. Oxygen at the anode and cathode through the electrolyte when the redox reaction of the metal ions of the anode , releasing electrons , the size of the current proportional to the amount of oxygen , the reaction of the whole consumption of the anode metals , Engine Coolant Temp Sensor needs to be replaced regularly. Domestic technology has matured , can localization of such sensors.

Constant potential electrolytic gas sensor

Constant potential electrolysis sensor is the measure most widely used drug class field a technology leader in this area of foreign technology , so this type of sensor is mostly dependent on imports. Constant potential electrolysis gas sensor structure: in a plastic tub made ​​of a cylindrical body , the installation working electrode , a counter electrode and a reference electrode , an electrolyte is filled between the electrodes , made ​​of a porous PTFE membrane , the top of the package. Preamplifier connected to Cooling Temp Sensor electrodes , applied between the electrodes a certain potential, the sensor is in working condition. Gas and the working electrode electrolyte oxidation or reduction reaction occurs in the reduction or oxidation of the electrode reaction , the equilibrium potential of the electrode is changed , the change is proportional to the gas concentration value .

Catalytic combustion sensor

Catalytic combustion sensor principle is the most widely used one of the principle combustible gas detector , the output signal having good linear , exponential , reliable, cheap, non- combustible gases and other non- cross- interference characteristics . Catalytic combustion  Crankshaft Position Sensor using a Wheatstone bridge principle , the sensor resistance in the environment of the combustible gas generating flameless combustion , the temperature sensing resistor to change, to break the bridge is balanced , so that the outpcurrent signal stability , and then through post- amplification circuit , stability and reliable numerical processing of final display .

Metal oxide semiconductor type sensor

Metal oxide semiconductor gas sensors using measured adsorption of the semiconductor conductivity change , current change by comparing the excitation alarm circuit . Because the semiconductor Cooling Temperature Sensor  measurements influenced by the environment , the output linear instability. Metal oxide semiconductor sensors , because the reaction is very sensitive , it is now widely used to measure the field of micro gas leakage phenomenon .