Gauge Pressure Transmitter (GP) Absolute Pressure
Transmitter (AP)
Chart 2 Gauge (GP)pressure transmitter/Absolute（AP）pressure transmitter
Pressure transmitter includes two functional units:
0 Main unit
0 Auxiliary unit
Main unit includes sensor and process connection, working principle as followed:
Through corrugated, isolated diaphragm and filling oil, process media is pressurized to diaphragm of
pressure sensor. The other end of pressure sensor diaphragm is connected to the air (for gauge measurement)
or vacuum(for absolute measurement). In such way, it makes the resistor of sensor die change so that the detection
system outputs different voltage. The output voltage is in proportion to the pressure variation, and then it is
transmitted to standard output by adapter and amplifier.