Johnson Controls P74HA-14C Differential Pressure Control, 4-Wire Close On Increase In Differential Press, 8/60# Adj,Ammonia

Johnson Controls P74HA-14C Differential Pressure Control, 4-Wire Close On Increase In Differential Press, 8/60# Adj,Ammonia. The Johnson Controls (PENN) P74 Series Differential Pressure Controls sense differences in pressure between two points, for operating or limit controls. These are desinged to detect flow across chiller or water cooled condensor, or in a heating system, or in refrigeration compressors (sensing lube oil pressure differential).