The Liebert 148372P2S SPDT High Pressure Switch (400 PSI) is a durable safety component designed for HVAC and refrigeration systems. It monitors refrigerant pressure and activates or deactivates electrical circuits to protect compressors and related equipment from excessive pressure conditions. Commonly used in precision cooling units, air conditioners, and refrigeration applications,... https://www.partshnc.com/148372p2s-liebert-spdt-hp-switch-300ci-400co