There are four pressure sensors which strain classification

Strain gauge pressure sensor is a pressure sensor in the application of more of a sensor, usually used to measure the pressure of a large , widely used measurement pipe internal pressure , internal combustion gas pressure, differential pressure and the injection pressure, engine and missile tests in the pulsating pressure, and the various areas of the fluid pressure. Also, the sensor has multiple types, different species have different effects 1 , modular : composition strain pressure sensor, the sensing element can be divided into the elastic member and the elastic strain components feelings . Wherein said Shaft Position Sensor converts the pressure force is transmitted to the elastic strain components strain most sensitive parts , and the strain gauge is attached to the elastic strain components at maximum strain . In fact, the more complex strain and strain tubular beam are of this type .2, the diaphragm : its elasticity sensitive element is clamped circular metal flat diaphragm . The diaphragm is deformed under pressure , the center of the radial and tangential strain of the strain reaches a positive maximum , and the negative edge of the radial strain at the maximum shear strain is zero. So often the two strain gauges were attached to the positive and negative maximum strain point , and then into the adjacent bridge arm bridge circuit to obtain greater sensitivity and temperature compensation.3 , strain beam : measuring small pressure, may have fixed beams or other structural beam intensity . One method is to use the diaphragm pressure transducer Weili dowel passed through to the strain beam, beam fixed at both ends of the maximum strain at both ends and the midpoint of the beam , the strain gauge was attached at these places. There are other forms such a structure , for example, the cantilever can be constituted of the diaphragm or bellows .4 , the tubular strain : Strain tubular barrel known as strain , its elastic sensing element is a thin-walled cylinder closed at one end , the other end with a flange connected to the system under test . Affixed to the tube wall with two or four strain gauges attached to the solid portion half as a temperature compensating plate , the other half as a strain gauge measurement .This Positioning Sensor can also be used convert the measured pressure piston force is transmitted to the strain on the tube or through the diaphragm shape pendant chain transfer measured pressure . Strain tube pressure Cooling Temp Sensor structure is simple, easy to manufacture , applicability, in rockets, artillery shells and dynamic pressure measurement has a broad application .