This is a new Binary Safety Switch.  Part # GH102BIN KIT

This High/Low Compressor Safety Switch is a two function switch that protects the A/C system from excessively high or low pressures, and is compatible with all refrigerant types.

Switch Pressures:

LOW: OFF @ 28PSIG - ON @ 29PSIG

HIGH: OFF @ 454PSIG - ON @ 369PSIG

Plug and wire included.