The electro-pneumatic transducer PT 700 series provides the proportional conversion from a 4...20 mA input signal to a 0...100% supply pressure output signal. This device
provides the interface between the electro-pneumatic positioner and a pneumatic actuator of process industrial applications (chemical, petro-chemical, refineries etc.).
They are easy to adapt and improve the performance of the control loop with optimized dynamic behaviour. The transducer PT 700 series is the first which uses piezoelectric microvalves with low power consumption allowing connection to standard two-wire circuits. No extra power supply is needed and makes the device very compact and robust.