Proportional Pressuretrol Controller, 5-150 PSI Operating Pressure Range, 11-52 PSI Pressure Differential, Dual Potentiometer, 140 Ohms, Use with Steam, Air, Noncombustible Gas or other Non Corrosive Fluids, 1/4" NPT External Thread, Brass Bellows, 32-150 Degree Temperature Range

10/300# PROP.#-TROL,2-135@POTS