Pressure, also become the pressure, said vertical force per unit area size. Pressure formula for P = F/S. The legal units of mpa pressure (Pa), in engineering application are also useful in the ATM, mmH2O, mmHg, bar and psi, said its conversion relationship is:

1 pa = 9.869323 * 10 ATM = 10-5-6 bar = 7.50062 * 10-3 MMHG = 102.074 * 10-6 mmh2o = 145.036 * 10 - psi

The kinds of pressure differential pressure, absolute pressure, table, etc., the relationship between them in the sensor have been introduced in the home, now no more, here is a kind of commonly used pressure sensors and strain type pressure sensor.

Strain type pressure sensor of sensitive element for a round metal diaphragm, when the forces acting on it, it will produce strain and strain with tangential strain and radial strain. In the center, two colleagues to maximum positive; On the edge, the radial strain have the largest negative, tangential strain is zero. Strain type pressure sensor is the biggest in the two biggest positive and negative respectively labeled four strain gauge, the composition of the whole bridge circuit to measure pressure. This patch type strain pressure sensor structure is simple, the accuracy is not high, the whole bridge circuit temperature compensation effect.

High precision strain gauge pressure sensor are using diaphragm structure. This kind of membrane structure can ensure that four resistance tolerance has good consistency, the bridge of the zero point can be reached symmetry, it also has a large range, high sensitivity, as well as the low cost advantage.

This article from the sensor is the home of the original, reproduced please indicate the source.