The pressure sensor is different from the pressure switch
The American UE pressure switch is pure mechanical deformation, resulting in microswitch action. When the pressure increases, the pressure applied on the sensor of different components (diaphragm, bellows, piston) deformation, will move upward through the bars, springs and other mechanical structure, finally start the micro switch on the upper end, the electrical signal output.Pressure transmitter is mainly composed of pressure sensor, measuring circuit and process connection etc.. The pressure transmitter can receive the gas and liquid pressure signal into a current signal standard (4~20mADC), indicating alarm device, recorder, regulator etc. Two instrument for measurement, instructions and process control to supply.
The output signal of the pressure sensor is analog signal, that is to say, the signal is variable, and the signal of the pressure switch is connected and disconnected.
The pressure switch and the pressure relay are the on-off outputs!The pressure sensor is analog signal output!
