P74 Series Differential Pressure Control, Volts:600, Phase:1, Pilot Duty:125VA, 120 to 600VAC; 57.5VA, 120 to 300VDC Hi Event:15 PSI, Low Event:9 PSI, Application:Differential Pressure Sensing on Chillers and Water-Cooled Condensers, Return/Supply Connection:1/4" Flare, Dims:3 1/4"H X 4"W X 2"D, Weight:2 Lbs 4oz, In Mfg Box, Made In Mexico.(Alt P74BA-9C)