Carrier 328270-409 Tube Pressure Switch

The Carrier 328270-409 is a tube pressure switch and is an essential safety appliance in HVAC, which uses refrigerant. It works in the background as a protector and measures refrigerant pressure in the copper tubing. When pressure levels are lower than or higher than the operating pressure the switch gives an electrical response. This may include derating or turning off the compressor if there is rare pressure, it may also involve stopping the whole system if there is high pressure. This is a small component that is usually installed along a refrigerant line; it has a length of 23 inches and diameter of 0.29 inches.