Binary A/C Safety Switch
From TBI Products
This Binary switch provides 2 essential air conditioning functions. It Protects the system (by disengaging the compressor clutch) from excessive high pressures or low system pressures.
Don't forget to install a safety switch. Most compressor failures result from this oversight. Also, many A/C manufacturers will void the warranty if a safety switch is not installed.
Female safety switches have a built in schrader valve that allows for switch removal or replacement without loosing your refrigerant charge.