The NOSHOK 400 Series Pressure Switch is a snap action, high current device that offers field adjustability. The 400 Series has switch adjustment ranges from vacuum through 4,600psig with a standard zinc-nickel with buna-n diaphragm wetted parts. This switch also provides an improved contact rating over the previous version of 6A 125V/250VAC, and 6A 12/24VDC.