Fisher 546 Electro Pneumatic Transducer: receives a direct-current input signal and use a torque motor, nozzle-flapper, and pneumatic relay to convert the signal to a proportional pneumatic output signal.

Input Signal 4 to 20 mA and Output pressure 3-15 PSI

Vibration Resistance
High natural frequency of torque motor moving parts results in negligible vibration influence.

Easy Adjustment
Screwdriver adjustments for span and zero are conveniently located and have arrows indicating rotation to increase settings

Field-Reversible Action
No additional parts required to reverse action.

Simple Relay Removal
Integrated pneumatic relay is mounted outside case and can be removed without disturbing electrical or pressure connections or impairing explosion safety.

67 AF Filter Regulator

Used to provide constantly controlled reduced pressures to pneumatic and electropneumatic controllers and other instruments