Detection Circuitry:

Above figure displays a block diagram of a classical pressure detection circuit.

Figure: Typical Pressure Detection Block Diagram

The sensing components sense the pressure of the monitored system and convert the pressure to a mechanical signal. The sensing components supply the mechanical signal to a transducer, as described above. A transducer converts the mechanical signal to an electrical signal which is proportional to system pressure. A transducer is not required and therefore not used if the mechanical signal from the sensing element is used directly. A detector circuitry will amplify and/or transmit this signal to the pressure indicator. The electrical signal produced through the detection circuitry is proportional to system pressure. An exact operation of detector circuitry depends upon the category of transducer used. The pressure indicator gives remote indication of the system pressure being measured.