YLE Camshaft Position Sensor Photoelectric crankshaft position sensor signal from the signal generator and the composition of the disk with a light hole

Photoelectric crankshaft position sensor is generally installed in the distributor , the signal from the signal generator and the composition of the disk with a light hole . Its YLE Crankshaft Positioning Sensor signal plate together with the distributor shaft rotation , the signal plate outer ring 360 lithography gap , generating a signal of 1 ° crank angle ; slightly inside there are six intervals 60 ° aperture cloth , producing a crank angle of 120 ° signal, wherein an aperture is wider, with respect to cylinder 1 TDC signal is generated . The signal generator is mounted on the distributor housing , the two light-emitting diodes , photodiodes and the second circuit only . Light-emitting diodes facing the photodiode. Signal plate located between the light-emitting diodes and photodiodes , because the signal plate light hole , the resulting alternating transparent and blackout phenomenon . When the beam of light emitting diodes photodiode , the photodiode YLE Crankshaft Positioning Sensor generates a voltage ; when the LED light is live file , the photodiode voltage is 0 . The voltage signal amplified by the shaping circuit portion , namely the electronic control unit crank angle signal transport , the electronic control unit 1 ° and 120 ° when the engine rotational speed calculated based on these signals and crankshaft position

TheYLE Motor Sensors working principle of CO2 sensor

The working principle of the CO2 sensor is: using the single beam dual wavelength non divergent infrared delta method, which is unique in the filter -- 1 kinds of pocket electronic tuning interferometer mirror it. This filter milling to ensure the accuracy and stability of YLE Automotive Temperature Sensors wavelength of light it through, to avoid the abrasion of rotary filter filter, the brake is not matching and traditional and generating problem arising. This paper is to discuss the optical measurement method of non divergent infrared measurement. A variety of gas will absorb light. Different gases absorb light of different wavelengths, such as CO2 to infrared light (wavelength 4. The most sensitive 26m). Carbon dioxide analyzer is usually measured gas inhalation of a measuring chamber, one end of the measuring chamber is provided with a light source and the other end is provided with the filter and detector. The filter's role is to allow only certain wavelengths of light through the. The YLE Coolant Temp Sensordetector is measured by the light flux measurement chamber. The luminous flux received by the detector was determined to in the environment of measured gas. Measurement method of non divergent infrared gas detection based on the principle of mainly has 3 kinds: single beam single wavelength measurement, the Shuang Guangshu dual wavelength and dual wavelength single - beam measurement. The implementation of Chinese sensor network transactions mainly talk about here in front of two kinds of measurement methods.

Temperature sensor in the development of the smart refrigerator

Original Six door refrigerator received attention, which is equipped with a new generation of vacuum chamber refrigerator , while the new intelligent vacuum ice greenhouse according to different vegetables, fish and other food ingredients , automatic switching optimal preservation temperature 1 ℃ / -1 ℃ , the eliminating the need for manual adjustment of trouble, easy to enjoy healthy and delicious .Especially in terms of energy saving , a refrigerator dedicated power saving procedure in the case of food preservation does not affect the cooling intensity is slightly weak tone , while the control speed of the compressor . Open the refrigerator door is usually the voice prompts after 1 minute will be shortened to 30 seconds after the prompt , and the LED lights inside the refrigerator will be prompted by the lights dimmed refrigerator door closed as soon as possible . Intelligent memory analysis , and by Camshaft Position Sensor of the refrigerator door opening and closing frequency analysis using household usage, no other family members at night or infrequently used defrost heater operation period , in the period of high frequency , inhibiting due to temperature rise caused by the defrost heater .It is reported that the temperature sensor in the refrigerator works is this : decide whether to open the compressor according to the temperature of the refrigerator and freezer cases , if the freezer temperature is too high , then open the electromagnetic popular V1, close the valve V2, V3, open at the compressor , high temperature high pressure superheated condensed through the condenser , dry filter and dried down the capillary orifice tube , refrigerant vaporized in an evaporator to produce low-pressure low-temperature drying gas . Flows into the refrigerator compartment through the solenoid valves V1 , so rapidly reducing the temperature of the refrigerator , when the compressor temperature reaches the required closed while closing the electromagnetic valve V1. If the freezer temperature is too high , you should open the V2 closed V1, V3. Solenoid valve V3 is mainly used for defrosting the freezer . V3 of the need to open the box , passing through the freezing chamber can be uniform vaporization frost freezer compartment temperature from the compressor outflow pressure gas . To achieve the effect of frost . Generalized frost shorter time , otherwise it will hurt the stored food .Essential quality refrigerator Auto Temperature Sensor performance , and its identification as follows: Since the refrigerator temperature sensor series negative temperature coefficient thermistor , so we can measure the resistance change using the " hand method ." When the hand grip temperature sensor , its resistance varies with temperature , normal to tens of thousands of European Euro . After the hand release , its resistance and recovery. If the holding temperature sensor , the resistance change, or a small range of variation , the temperature sensor is defective and should be replaced.

What sensor engineering test requirements

Engineering Test sensor What are the requirements ? Sensor like human sensory organs, we can imagine its importance , so that the process of selection of test sensors is very critical.

First, the technical performance requirements of engineering tests on the sensor , Car Temperature Sensor output of the physical object to be measured is converted into an electrical signal surgery performance following requirements: high sensitivity, wide linear range ; quick response , after fishing , drift ; output signal to noise ratio times high ; stability , good repeatability ; good dynamic performance ; loading effect is low.

Followed by the selection principle of the sensor is divided into several, according to the measurement mode selected in engineering test against working conditions, work the measured object , choose different measurement methods . If contact with the non-contact measurement ; destruction and non-destructive measurement ; online and offline measurement. Different measurement methods , the selected Shaft Position Sensor is also different. For non- contact measurement , the choice of capacitive, eddy current non -contact sensor is more appropriate. For non- destructive measurement that is non-destructive testing , use of ultrasonic , acoustic emission sensors, such as more convenient. Choose different measurement requirements according to the requirements of the selected sensor measurement is not the same . Such as eddy current displacement sensors and variable capacitance sensor pole pitch , are non- contact measurement of micro-displacement sensor , although the sensitivity of the former without the latter is high, but the stability of the former better than the latter. Thus , we must consider the selection of the specific measurement requirements . By using the method of election , breed quickly sensing technology developed in recent years , the sensor specifications very numerous. Every year, many new sensor types appear , which provides a lot of convenience for the selection of the sensor. When selected , requires easy to use as possible , even in the installation, commissioning and maintenance. For example , the rotary shaft of the test structure used with the touch sensor needs to use slip rings or telemetry device , and the use of non-contact sensor is more convenient.

Sensor characteristics

Sensor means able to feel a predetermined physical quantity , according to certain rules to convert the device or the device may be the input signal. Simply put , the non-power Engine Water Temperature Sensor is converted into electricity devices.
Sensor sensitive element usually consists of the conversion element and the measuring circuit of three parts .
1 ) , can feel the sensitive element is the direct ( or response ) was measured part , is about to be measured by conversion into the sensitive element of the Car Temperature Sensor has to be measured to determine the relationship of non-electricity or other amount .
2 ) , then the above-mentioned non-electricity conversion device converts electrical parameters .
3 ) , the effect of the measurement circuit is to convert the electrical parameters of the input element is processed into a voltage , current or power frequency can be measured in order to display, record , control and processing section.

Speed ​​Sensor

Electric vehicle speed sensor is more important sensors are also more sensor applications. By definition , speed sensors are used to measure the speed sensor is divided into speed sensor, speed sensor, wheel speed sensors. Speed ​​Crankshaft Sensor Replacement are used for electric cars motor rotation speed is detected. There are three commonly used speed sensor , namely electromagnetic induction speed sensor , speed sensor photoelectric sensors , Hall-effect speed sensor , are using non-contact measuring principle, in order to enhance detection of security, improve the detection accuracy . The vehicle speed sensor for measuring the speed of electric cars . Speed Car Temperature Sensor signal is mainly used for the dashboard speedometer display and the engine idling , the electric vehicle acceleration during the control. Currently the vast majority of China's electric car speedometer on a car forum selection are converted into speed speed speed of the car . In the case of this car braking , skidding , and the forum because of old and new , friction , road , tire pressure , etc., causing the outer circumference of the level of change will cause the error is too large , or even not work , there are electromagnetic induction speed sensor , photoelectric type, variable reluctance and Hall -style concentration. Generally using electromagnetic induction and the Hall speed sensor on electric vehicles.

How to use the temperature sensor to the motor, to control the motor start and stop

The temperature sensor is generally a thermocouple type, directly connected tothe input end of the controller can be, about a hundred block controller can buydigital display type, it can be a temperature calibration, can set the temperaturecontrol point, Cooling Temperature Sensorsee the manual controller can be, generally have one or twoindependent contact (normally open and normally closed), contact power Car Temperature Sensorsupplycontactor coil power by temperature controller, it can control the motor, if you are using a single-phase motor, power is small, even can directly to the power supply via a temperature controller contact power supply to the motor.

Motor comes with temperature sensor

General 220V motor or transformer with a PTC device controller, this element isbound in the bridge line of stator winding temperature of Coolant Temperature Sensor60 degrees, the general election, the motor winding temperature exceeds the value of the element isautomatically disconnected, and then the lead wire is connected with the control circuit, the effective protection of large motor, but not found have installed,because in the circuit has a thermal relay protection will be delayed for a period ofprotection, motor Car Temperature Sensoroverload, if you installed him, occasionally a pulse will cause the motor to stop rotating, actually does not affect the normal operation of the motor,in a complete chain circuit will result in The loss outweighs the gain. effect. If you want to monitor the motor temperature, a temperature detection facilities.

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How to install vibration velocity sensors

Speed ​​sensor vibration velocity sensor , the vibration velocity is typically used to measure the vibration of the bearing , but there are a few cases in the shaft for measuring vibrations. How to install vibration velocity sensors do ? In the measurement of vibration velocity , if sensor is installed incorrectly or is not securely installed , themeasurement results will cause distortion due to vibration or damage caused by the speed sensor . So we
have to consider a good choice for vibration velocity sensor is installed. When the speed sensor is used to measure shaft vibration when installed in the field are usually taken with the hand , sticky water plasticine magnetic disk fixed , bolted in several ways . In the temporary vibration measurement , in most cases, hand sensors way , this method measured flexible , easy to use , especially when the number of the lack of vibration velocity sensors and sensor interchangeability bad, has a special advantage ; And this the disadvantage is that the test measurement error is relatively large, and the intensity of work is relatively large . Current speed sensor when measuring the vibration velocity , usually people will use Auto Temperature Sensor fixing screws directly on the bearing , not only can reliably measure the bearing at the top of the vibration in three directions , but also can be measured in two directions perpendicular to the plane of vibration this method is the best way to install the measure . Also has a different installation methods , due to the installation of the various conditions to determine that we have a good effect on manually installing a useful little plasticine paste Crankcase Position Sensor is also more convenient , you need to note that plasticine vibration velocity sensors can not be pasted into the vertical plane , and can only be fixed on a horizontal surface , as affected by temperature adhesive force , high temperature and the lower the adhesive strength will be significantly reduced, so it is not suitable for fixing the high temperature high pressure turbine rotor and reel measuring wheel speed Crankshaft Positioning Sensor bearing ; winter cold start , the bearing temperature is too low and it is not used . There is a similar permanent magnet sucker fixed speed sensor mounting , etc., when we observe the installation follow the rules is to measure the needs , the need to make sense of your environment changes , so that the vibration velocity sensor mounted only purpose is to more has the effect of reducing unnecessary errors.

What are static load cell features

The operating characteristics of the sensor by means of its static and dynamic characteristics reflected directly measuring system input is not constant over time and the system is present between the input and output static characteristics is the relationship . The static characteristics of the weighing sensor is divided into five parts. - Weighing Sensor Static One is repeatability, reproducibility refers to the so-called sensor input for full scale in the same direction repeatedly changed, the resulting curve degree of inconsistency . In those who are weighing sensor sensitivity and linearity, sensitivity sensor static characteristics is an important indicator . Which is defined as the amount of output incrementincrement causes the ratio of the corresponding input increment . S is a sensitivity. The linearity of the sensor is output and input of the actual relationship between the degree of the curve -fit straight line deviation . Defined as the whole range of the actual characteristic curve and the maximum deviation between the fitted line with the full-scale value of theratio of the output value . Static characteristics of the load cell is important to drift, the same amount of the input , Crankshaft Sensor output varies with time , this phenomenon is called drift, and other similar weighing sensor drift mainly generated by Car Temperature Sensor is the sensor their structural parameters and application ambient temperature , humidity and other effects .Weighing sensor input changes from small to large and from large to small input and output characteristic curve during the input phenomenon does not overlap a static characteristic is the sensor end , the input signal for the same size , Motor Position Sensor output signal of the positive and negative stroke not of equal size , this difference is called hysteresis difference . - Static characteristics of the load cell refers to the static input signal , the output of the load cell and the input of a relationship between . Because when both input and output , and time-independent , so that the relationship between them , the static characteristics of the load cell can be a free time variable algebraic equations , or-axisinput,theoutputofitscorresponding volume plotted as the ordinate andcharacteristic curvesdescribed.Characterization of the sensor static characteristics of the main parametersare:repeatability, sensitivity, linearity. Then the impact of the load cell measuring effects and selection of the key elements of that is that a few key points

For you to resolve the five sensor software technology

Digital sensor has a strong anti-interference ability , signal transmission distance , goodstability of these advantages, because it is being used to digital information technology into the sensor , and Cooling Temp Sensor software technology levels are therefore plays an important role inside . Under normal circumstances we have five kinds of software technology , give you a brief introduction below : scale conversion technologies: analog signal by the analog-digital conversion obtained after a series of digital , it must be converted with dimensionless data to calculate , display, which need to use scale conversion technologies. Digital zeroing technique : using a variety of procedures to achieve zero drift , gain, offsetcalibration drift . Digital filtering techniques : Car Temperature Sensor analog output signal, the analog-digital conversion into the microprocessor , the normally sharp pulse entering into therandom noise and the like , must be weakened and filter , the digital filter technology to solve this shortcoming . Temperature compensation : Expression temperature established mathematical model , with the difference between the other mathematical processing method , temperature compensation can be effectively achieved , depending on the effect of temperature on Auto Temperature Sensor output size. Nonlinear compensation technique : the measured characteristic curve, piecewise interpolation , if the interpolation points is reasonable and sufficient , excellent linearity can be obtained . Integrated use of these five sensor software technology , for the design of the sensor is also helpful, software is the core, the hardware is the foundation, both have to take into account

Sensor type and application conditions , you should follow the recommended calibration method

The method of calibration . Taking into account all the factors , such as sensor type and application conditions , you should follow the recommended calibration method : According to the operator's judgment , gas sensors surrounding gas is fresh , there is no abnormalcondition exists , then, the instrument indication near zero ( reading ) , zero setting process can be skipped. When in doubt , use a plastic bag aroundCamshaft Position Sensor to get some considered to be " fresh " air. This is a very quick and easy process . This method for the difference between true and false alarm warning is very effective . There is an advantage that the compressed air , the gas in the bottle is easy to control and easy to carry . The device is easy and convenient to get air . Such a small amount of air in the meaning of hydrogen and nitrogen , carbon monoxide , carbon dioxide and some other interfering gases . However , this gas is characterized by low humidity , the solution used in the sampling system with activated carbon filters are used to filter out unwanted wet gas in the gas and water vapor. After this process , we can use the gas for various types Car Temperature Sensor calibration . However, it should be noted that carbon monoxide gas and not through a filter with activated carbon and filtered . Therefore, the rule states: cylinders of carbon monoxide gas with the surrounding environment must be the same content . In addition , the use of soda ash filter can filter out carbon monoxide. Since the sampling system using the soda ash line filter can filter out although an oxygen gas is usually very pure man , but it can not be used for solid-state Engine Water Temperature Sensor and
photoionization detectors, because such sensors require the gas contained in the sampling some water vapor. A simple way to solve this problem is to use the sampling system pipeline damp tissue paper . Its role is to make the wet stream sample , the sensor has sufficient water vapor. Another option of using NAFION tube

Dynamic torque sensor installation

Dynamic torque sensor installation:1, the use of the environment: Car Sensors should be installed in an ambient temperature of 0 ℃ ~ 60 ℃, relative humidity less than 90%, non-flammable and explosive chemicals environment. Should not be installed in the strong electromagnetic interference in the environment. 2, Installation: (1) Horizontal mounting: (2) vertical mounting: 3, Connection: Engine Water Temperature Sensor with power equipment, the connection between the load equipment (1) flexible pin coupling connection, this connection structure simple, easy processing, easy maintenance. Trace caused to compensate for shaft misalignment relative offset, and can play a minor role in damping. For medium load, high-speed operation starting Car Temperature Sensor, the working temperature -20-70 ℃. (2) rigid coupling connection which forms a simple structure, low cost, no compensation performance, not buffer damping of high mounting accuracy of the two axes. For vibration small working conditions.

The advantage of digital load cell

First, the transmission distance, communication speed, the effect is significant anti-cheating traditional analog load cell output signal is small , typically millivolts during transmission due to cable resistance effects , there is loss of signal , but also susceptible to ambient interference , it is not for long-distance transmission. Its signal cheating a lot, usually difficult to control. The digital load cell signal output is digital, not only a high level , the impact of interference is very small, and it is the use of field bus technology, communication speed is super fast , but also with a communication error correction function, due to the confidentiality of communications protocols , cheating is basically impossible , so get a high data reliability . Second, anti-interference ability , high reliability, good lightning performance analog sensor output from the instrument power supply , power quality affected by the instrument . Between them susceptible to electromagnetic interference and surges. Instability of the power supply of Shaft Position Sensor output is also great, likely to cause instability in the output , the high voltage transient will cause the sensor damage. Digital sensor with a new welding manufacturing technology, which is also filled with helium safety protection circuit , a very high degree of protection . In order to prevent lightning surge interference , which uses the output voltage of the instrument reprocessing meet the sensor supply voltage requirements , so that the output signal becomes stable , the sensor will not be damaged . Three , eliminating calibrated load cell to get the scene, there is no suitable counterweight system calibration is generally difficult , if not then its calibration , the error will be great. Engine Coolant Temp Sensor during the live connection has loss, so must be carried out on-site calibration . And now digital sensors can dispense the job , because it has been used in the production of standard dynamometer was calibrated , and its output is the corresponding standard values ​​. Since it does not substantially project in the transmission loss, so the read value is the actual measurement value , so it can save the calibration of the link. Fourth, you can work uninterrupted digital sensor error function it has a fault , once fails, it will output the signal to the instrument , the instrument signal is received , you can abandon its value , to automatically start uninterrupted work, can still guarantee a certain accuracy , the user can always know which sensor needs to be replaced , will not cause the production stagnant . Coolant Temperature Sensor can not meet that requirement , once the fault will cause production downtime , affecting plant efficiency. Five , easy maintenance, low overall cost of using digital load cell with a standard cable plug, both to ensure the protection level, and the replacement of the sensor or the cable is very convenient, but because of its digital output , without the impact of cable length . The analog temperature compensation of the sensor it is together with the cable , the cable will be connected after damage caused by errors , so many sensors are connected together with cable , replacement when it need to re- stringing , very inconvenient to use . It now appears that , although the digital sensor more than analog sensor circuit board , but not in the course of calibration , commissioning time will be greatly reduced , higher reliability , but also has a self- diagnostic function, can not be shut down for some production units , it also ensures uninterrupted work , saving production costs, so in general, it uses the overall cost is lower than the analog sensors .

How to select the flow sensor

Liquid density sensor means can feel liquid density , and it can be converted into an output signal that can be used sensors, liquid density sensor can be divided into six categories: capacitive, ultrasonic , tuning fork , resonant , radiation type and vibrating tube liquid Shaft Position Sensor . Capacitive liquid density sensors it is not based on the same liquid sample , the standard different buoyancy body , this will lead to an object connected with standard two capacitance change in the distance between the plates , and resultant capacitance changed. Because different liquid density sensor for different occasions , so in practical application , it should be depending on the nature of the liquid to be measured also on the measurement accuracy requirements, and so the situation and the choice of suitable sensors. Ultrasonic Density sensors it is higher than the frequency of the ultrasonic mechanical waves of 20kHz and an ultrasonic wave only may be in the form of propagation in a liquid medium . It is for the phase , frequency, speed and attenuation properties of the medium will be subject to impact , so, it can be based on the ultrasonic propagation properties and some of the correspondence between the density of the liquid to measure the density of the liquid . Its main advantages are: it can achieve non-contact measurement, the measurement accuracy is relatively high, relatively fast response ; and it has no moving parts , so the stability of the measurement is better ; it is not radioactive , there is no harm to the human body . The disadvantage is that there are impurities in the liquid medium , for example , bubble can lead to severe attenuation of the ultrasonic signal ; precision measurements in viscous media , the need to consider the impact of medium viscosity ; it will make some measurements lead to instability .Auto Temperature Sensor it is based on the liquid density in the liquid , the mass of small tuning fork vibrates, its inherent frequency change , so to measure the density of the liquid . To obtain high accuracy measurement results , it is necessary to detect the resonant frequency when the change is small , it is necessary to design rational vibrating unit , so that the vibration unit can be a relatively high mechanical quality factor . Fork usually made ​​of glass or stainless steel . Resonant resonant liquid density sensor measuring principle is based on the vibration characteristics of a harmonic oscillator to work . In operation, the resonator can be equivalently used as a single degree of freedom system , with the natural frequency of the vibration , the natural frequency of the system with the system is only the equivalent elastic modulus and the equivalent mass . Resonant liquid density sensor measuring principle is the liquid through the system and the elastic contact with sensitive components cause changes in the system of equivalent mass , resulting in changes in the natural frequency of the system . Measuring system according to a fixed frequency variation can know the density of the liquid to be measured . Liquid Density Sensor ray rays Liquid Density Sensor The main disadvantages are: it is not very high resolution ; it needs a relatively long time have stability ; It requires radioactive ray source . Its advantages are: the liquid flow sensor does not generate resistance to the flow size is not limited, and it can measure the density of the multiphase fluid ; when it is not in contact with the measurement of the liquid under test , it can be realized non-contact measurement . Liquid Cooling Temperature Sensor vibrating tube vibrating tube type liquid density sensor can reasonably be arranged drive member , to allow the inside tube vibration in the same plane , it is the measured density of the liquid flowing in the tube the average mass density . The sensitive element is that it uses a long tube vibration , its length is about 20 times the diameter .

How to install vibration velocity sensors

Speed ​​sensor vibration velocity sensor , the vibration velocity is typically used to measure the vibration of the bearing , but there are a few cases in the shaft for measuring vibrations. How to install vibration velocity sensors do ? In the measurement of vibration velocity , if sensor is installed incorrectly or is not securely installed , the measurement results will cause distortion due to vibration or damage caused by the speed sensor . So we have to consider a good choice for vibration velocity sensor is installed. When the speed sensor is used to measure shaft vibration when installed in the field are usually taken with the hand , sticky water plasticine magnetic disk fixed , bolted in several ways . In the temporary vibration measurement , in most cases, hand sensors way , this method measured flexible , easy to use , especially when the number of the lack of vibration velocity sensors Engine Temperature Sensor interchangeability bad, has a special advantage ; And this the disadvantage is that the test measurement error is relatively large, and the intensity of work is relatively large . Current speed sensor when measuring the vibration velocity , usually people will use Engine Temp Sensor fixing screws directly on the bearing , not only can reliably measure the bearing at the top of the vibration in three directions , but also can be measured in two directions perpendicular to the plane of vibration this method is the best way to install the measure . Also has a different installation methods , due to the installation of the various conditions to determine that we have a good effect on manually installing a useful little plasticine paste the speed sensor is also more convenient , you need to note that plasticine vibration velocity sensors can not be pasted into the vertical plane , and can only be fixed on a horizontal surface , as affected by temperature adhesive force , high temperature and the lower the adhesive strength will be significantly reduced, so it is not suitable for fixing the high temperature high pressure turbine rotor and reel measuring wheel Car Temperature Sensor bearing ; winter cold start , the bearing temperature is too low and it is not used . There is a similar permanent magnet sucker fixed speed sensor mounting , etc., when we observe the installation follow the rules is to measure the needs , the need to make sense of your environment changes , so that the vibration velocity sensor mounted only purpose is to more has the effect of reducing unnecessary errors

On the humidity sensor applications

Currently on the market humidity sensor applications is also increasing. Humidity sensors are used to measure or control the relative humidity of the gas or absolute humidity, dew point and so on. Can indirectly control the temperature . ( A ) in the humidity measurement system application ( a ) below 70 ℃ ( normally at -40 ℃ above ) , if relatively clean environment , the use of polymer sensors, polluting the use of Camshaft Position Sensor ( heating washing of regeneration type ) . Heating the cleaning process as it exists , can not be continuously measured , and the large energy consumption (1 ~ 10W). However, long life, use the optional heated sensor clean cycle is longer , such as chlorine oxy apatite ceramic sensor , 2 ~ 3 months wash , in addition, internal heat than the outer heat and low energy consumption . ( 2 ) In the range of 70 ~ 100 ℃ measured humidity , washing with a heating Engine Coolant Temp Sensor , to improve the accuracy of linear and temperature compensation. In order to achieve more accuracy will have with the microcomputer. In hot and humid heat required frequent cleaning, such as more than 80% RH , the need to 30S cleansing once daily, preferably equipped with automatic cleaning device heating . ( 3 ) in the range of 100 ~ 150 ℃ humidity measured in the international community , mostly made ​​of ceramic Automotive Temperature Sensors temperature and humidity instrument . ( Two ) in the industrial automatic control application process in order to improve product quality and energy , usually in the product drying system , humidity control reactors , boilers, water vapor leak detection, integrated circuits or the head of the air-conditioning plant mostly using ceramic humidity sensor control ; variety of air conditioning systems, medical systems and humidity control can be polymeric or ceramic humidity sensor . ( Three ) in a steam leak detection systems used in thermal power stations , nuclear power plants, steam locomotives , boilers and other high temperature and pressure equipment , in order to prevent leakage, prevent accidents , humidity sensor can be used for leak detection . ( Four ) in the other systems used in home appliances dew condensation detection sensor can be used as tape recorders , car windows, condensation , frost detection.

Capacitive oil sensor line

Currently online oil pollution sensor is still in trial stage theory , the use of capacitive measurement method, ie detection software support, integrated by measuring the change in dielectric constant of oil to determine the extent of contaminated oil . Its working principle is: the oil as a dielectric , as new oil, and the oil 's dielectric constant is different when the oil change will cause a change in Crankcase Position Sensor via C / V conversion put this slight change frequency demodulation of the DC signal, the data acquisition circuit samples pre- amplification , A / D converter , sent to the microcontroller after the class consisting of hardware and software data processing system . System based on test data, analysis calculated determination of various types of oil pollution in the upper and lower threshold level target value by including algorithms for intelligent analysis and processing procedures , by the LCD Monitor Report User quantitative ( pollution index value ) and qualitative ( well, available , scrapped ) test results. Because the causes of oil pollution and environmental factors more complex , so the principle of Engine Water Temperature Sensor in the production practice has not been very good application. For example : As the engine piston blow-by , the delay of fuel injection causes the exhaust gas treatment system of exhaust gas into the cylinder , or a leak in the high pressure common rail diesel standard 2 contaminated oil, will cause the viscosity of the oil drop , but the oil dielectric no effect on dielectric constant and density .

Describes the characteristics of the thermocouple temperature sensor

Temperature sensor using the current very high rate in the industrial production , industrial development and use Crankshaft Positioning Sensor is currently running efficiency is very convenient to use the industrial automation , the temperature sensor is currently preferred product the thermocouple , the thermocouple is a a sensor measuring temperature , and thermal resistance are the same as the Camshaft Positioning Sensor , the two different materials a and B conductors or semiconductors welded together to form a closed loop, when two conductors a and B attachment between points 1 and 2 when the temperature difference between the two will generate an electromotive force , and thus forming a loop of current, a phenomenon known thermoelectric effect . Is called the Seebeck effect . Thermocouple probe is to use this effect to work . First, the nature of the signal , the thermal resistance is the resistance itself , temperature changes, the thermal resistor to generate positive or negative change in resistance ; the thermocouple, the induced voltage changes, he is changed with temperature . Second, Engine Water Temperature Sensor detect the temperature range is not the same, the general resistance test temperature range 0-150 ° , the maximum measuring range of up to 600 degrees ( of course, negative temperature can be detected ) . Third, from the material of resistance, which is a metal material having a metallic material changes in temperature-sensitive , bimetallic thermocouple materials , both of two different metals , due to temperature changes in the two wires of two different end generates a potential difference . Four , PLC corresponding thermal resistance and thermocouple input module is not the same , this sentence is not a problem , but generally have direct access to the PLC 4 ~ 20ma signals, and thermal resistance and thermocouple generally with transmitter only access PLC. If you do not have access to the DCS , then use the transmitter up ! Thermal resistance is the RTD signal , thermocouple is TC signal ! Five , PLC also has RTD and Thermocouple modules can be directly input resistance and thermocouple signals. Six , thermocouple J, T, N, K, S and other models , there are specific resistance expensive , there are also cheaper than the resistance , but the count compensation wire , thermocouple total cost will be high .

Barometric altitude sensor Features

Barometric altitude sensor is a change in the use of pressure sensors to measure the height of a. When measuring the height advantage of the processor because of the need to get through a formula to calculate the height values, so in the general election when Shaft Position Sensor output digital signals are used to. HM products mainly used in floor outdoor climbing altimeter GPS positioning tables, outdoor climbing phones, hunting cameras, parachutes, meteorological equipment and other fields. Main features: barometric Auto Temperature Sensor is achieved by changes in air pressure Camshaft Position Sensor to measure the height, so the measurement process from the impact of obstacles, measure the height range, easy to move, can be an absolute altitude measurements and relative height measurements. By pressure and temperature to calculate the height errors are relatively large, especially in the near-surface measurement, by the wind, humidity, dust particles and other effects, a high degree of accuracy of measurement. Very much affected, at high altitude measurement accuracy has improved.