1, piezoresistive pressure sensor
Resistive strain gauges are one of the main components of piezoresistive strain sensors. The working principle of metal resistance strain gauges is adsorbed on the substrate material strain resistance with mechanical deformation and the phenomenon of resistance change, commonly known as the resistance strain effect.
2, ceramic pressure sensor
Ceramic pressure sensor based on piezoresistive effect, the pressure directly on the front surface of the ceramic diaphragm, so that the diaphragm produces a small deformation, thick film resistor printed on the back of the ceramic diaphragm, connected to a Wheatstone bridge, due to the piezoresistive effect of the piezoresistor, so that the bridge produces a pressure proportional to the high degree of linearity, with the excitation voltage is also proportional to the voltage signal, the standard signal according to the pressure range is calibrated to different 2.0/3.0/3.3mV/V, etc., can be compatible with strain sensors.


3, diffusion silicon pressure sensor:
Diffuse silicon pressure sensor working principle is also based on the piezoresistive effect, the use of piezoresistive effect principle, the pressure of the measured medium directly on the sensor diaphragm (stainless steel or ceramic), so that the diaphragm produces a proportional to the medium pressure of the micro-displacement, so that the sensor's resistance to change, the use of electronic circuits to detect this change, and convert the output of a corresponding to the pressure of the standard measurement signal.
4, sapphire pressure sensor:
The use of strain-resistive operating principle, the use of silicon-sapphire as a semiconductor sensitive element, with unparalleled metrological characteristics. Therefore, the use of silicon-sapphire manufactured semiconductor sensitive components, insensitive to temperature changes, even at high temperatures, but also has very good working characteristics; sapphire radiation resistance characteristics; in addition, silicon-sapphire semiconductor sensitive components, no p-n drift. Piezoelectric pressure sensor:

5, piezoelectric sensors:

Piezoelectric effect is the main working principle of piezoelectric sensors, piezoelectric sensors can not be used for static measurements, because after the external force after the charge, only in the loop has an infinite input impedance is preserved. This is not the case in practice, so this determines that piezoelectric sensors are only capable of measuring dynamic stresses.