Honeywell On-Off Modulating and Limit Control, 120Vac, 0-300 PSI Operating Pressure Range, 15-50 PSI Pressure Differential, 4-20mA Output, Break on Pressure Rise, 1/2″ Npt Main or High Pressure Connection, Stainless Steel Solid State Sensor, 32-140 Degree Temperature Range, 5-95% RH Non Condensing Operating Humidity Range, Used with Steam, Air, Non Combustible Gases or Non Corrosive Fluids