Employing explosionproof, NEMA 4x/IP 66 housing, Fisher Model i2P-100 converts mA input signals to switch selectable proportional electro-pneumatic output signal. Dual compartments have explosive seal between explosive or corrosive process fluid and electronics. Integral pneumatic relay provides necessary capacity to drive pneumatic control valve/actuator assemblies without additional volume boosters or positioners. Selectable dipswitch can be set for output range of 3-15 or 6-30 psi.