Filter sensor is a commonly used sensor product type, mainly refers to the special sensor device on the automobile.

Filter sensor features
1. Filter sensor, with strong weather resistance, mainly works in engine vibration, gasoline steam, sludge and other harsh environments
2. The filter sensor performance indicators meet the standard, of which the most critical is the measurement accuracy and reliability, otherwise the sensor detection error, resulting in engine failure
3. Filter sensor, can directly reflect the vehicle operation fault, minimize exhaust emissions, fuel saving.

Filter sensor performance indicators

1. Filter sensor sensitivity: mainly depends on the manufacturing chip itself. Large electromechanical coupling coefficient, high sensitivity of filter sensor; On the contrary, the sensor sensitivity of the filter is low.
2. Filter sensor working frequency: resonance frequency of piezoelectric wafer. When the frequency of the AC voltage added to both ends is equal to the resonant frequency of the chip, the output energy is the largest, and the sensitivity of the filter sensor is also the highest.
3. Filter sensor operating temperature: Because the Curie point of the piezoelectric material is generally high, especially the diagnostic ultrasonic probe uses less power, the operating temperature is relatively low, and it can work for a long time without failure. The temperature of ultrasonic probes for medical use is relatively high and requires separate refrigeration equipment.