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.