PT611-CA pressure and absolute pressure transmitter uses advanced micro-silicon solid-state composite sensor, adopts modular design, and consists of sensor module with integrated electronic adaptation unit and amplifier with button control unit.The pressure and absolute pressure sensor module adopts silicon pressure and absolute pressure sensor chip, and the measured pressure and absolute pressure are transmitted to the silicon pressure and absolute pressure sensor chip through isolation diaphragm and filling liquid. The resistance of piezoresistive effect made on the sensor chip changes with the measured pressure and absolute pressure, which leads to the change of output voltage of the corresponding bridge. The output voltage, which is proportional to the pressure and absolute pressure, is converted into a standard output signal by an adaptation unit and an amplifier.