The Liebert 1D16206P1S Low Pressure Switch (20–65 PSI) is a precision control device designed to monitor and regulate refrigerant pressure in HVAC and refrigeration systems. It operates by opening or closing electrical contacts based on system pressure, protecting compressors from low-pressure conditions and ensuring reliable operation https://www.partshnc.com/1d16206p1s-liebert-2065-low-pressure-switch