The I/P Transducer provides communication between the flow computer and the control valve. The I/P transducer converts the analog electrical signal (4-20 mA typical) to a pneumatic input signal (3-15 psig or 6-30 psig). I/P transducers are compatible with all HPP Family Pneumatic Positioners.  Typically a pneumatic positioner and I/P Transducer combination may be required for fast-acting processes. Also offered is the EFP Series electro-pneumatic positioner that eliminates the need for an I/P transducer. The EFP electro-pneumatic positioner accepts the electronic input signal direct and positions the control valve proportionally.