The characteristics of the pressure sensor transmission thermometer factory group

Pressure transmitter sensor and transmitter based on different material and structure design have different waterproof performance and explosion-proof level, because of the difference of material, shape, joint fluid cavity measurable fluid type is different also, often divided into dry gas, liquid, acid and alkali corrosion solution, and special combustible gas, liquid and viscous medium. Pressure transmitter sensor principle is: will pressure the pressure on the mechanical signal into current ( 4 - 20mA) Such electrical signals a linear relationship with pressure and voltage or current size, generally is a positive relationship, so the transmitter output voltage or current with the pressure increases, thus obtained a pressure and the relation between the voltage or current, pressure transmitter of the two kinds of measured medium pressure ventilation with high and low pressure chamber, two low pressure chamber pressure by atmospheric pressure or vacuum, role in the delta yuan ( The sensitive element) On isolation on both sides of the diaphragm, the spacer and components on both sides of the filling liquid to measure the diaphragm. Pressure transmitter is by measuring diaphragm and on both sides of the insulation on the electrodes of a capacitor. When we have different pressure on both sides, to cause measuring diaphragm displacement, the displacement and stress is directly proportional to the difference, so both sides capacitance range, through the link of oscillation and demodulation, is converted into is proportional to the pressure signal. Pressure transmitter sensor as a meter must be used with secondary instrument or computer, pressure sensor and transmitter of the common power supply mode is: DC 5 v, 12 v, 24 v, + 12 v, output means has: 0 ~ 5 v, 1 ~ 5 v, 0. Five to four. 5 v, 0 ~ 10 ma, 20 ma, 0 ~ 4 ~ 20 ma, etc, Rs232 and Rs485 interface with the computer. Sensor static performance test project: zero output, the output full scale, nonlinear and hysteresis, repeatability, zero drift, overload. When users in the selection pressure sensor and transmitter, should fully understand the condition of pressure measurement system, the reasonable choice according to need, make the system work in the best condition, and can reduce the engineering cost.