Differential pressure sensor CSPD-4 is a stationary device for measuring difference of pressures in explosion hazard areas in underground coal mines.
It cooperates with telemetric central station CST-40A or CST-40C through analogue station CSA-1 or CSA-2. It may also cooperate with other devices provided that the parameters of terminal of the feeder-measurement line are compatible.
The device is available in five changes, which are different in symmetrical range of the measured difference of pressures:
It is power-supplied from an intrinsically safe 12 V source. Measured and processed values of difference of pressures are sent to a separate analogue outputs which generate a signal of 0.4 to 2V. Additionally, by modulating the analogue value, the output may also work in serial digital transmission mode. Output operation in digital mode enables sending to the central station of the CST-40 system (via the CSA-1 or CSA-2 station) measurement values of higher precision, sending diagnostic information and the manufacturer’s serial number of the sensor.
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