The CS type differential pressure transmitter is mainly used in the pipe passing thermostat. When the hydraulic system is working, the core of the superheater is gradually blocked because of the pollutants in the system, and the pressure of the inlet and outlet of the oil port produces pressure difference (that is, the pressure loss of the leakage core). When the pressure difference increases to the set value of the transmitter, the transmitter will automatically send out a signal to instruct the system operator to clean or replace the temperature core to ensure the safe operation of the system.