P12 Series differential pressure controls can be used with oil and non-corrosive refrigerants. The switch is actuated by a difference in pressure between the two sensing elements. Connect this control to a P28 Lube Oil Control, with time delay, to monitor lubrication on two refrigeration compressors driven by one motor.
P32 Series differential pressure switch senses pressure and air flow in electric duct heaters, humidifiers, air conditioning coils, and other equipment. Use to prove and control pressure/air flow, and detect clogged filters and iced coils.
P74 Series controls measure the pressure difference between supply lines and return lines. A change in differential pressure repositions the switching mechanism, causing corrective action. Use with chillers, water-cooled condensers, refrigeration compressors, and motor-actuated valves.
P128 and P145 Series controls provide dependable low pressure lube oil cutout for pressure lubricated refrigeration compressors. P128 controls offer adjustable range settings.
P545 Series electronic lube oil control is for refrigeration compressors with oil pumps that accept a single-point differential pressure switch. The P400 switch monitors net lube oil pressure, and the P545 control locks out the compressor if pressure stays below recommended levels beyond the recommended lube oil delay.