The NOSHOK 300 Series pressure switch is a SPST or SPDT snap-action switch with adjustable hysteresis and silver contacts. It offers switch adjustment ranges from vacuum through 4,600psig depending on model and a standard zinc-nickel housing with buna-n diaphragm wetted parts. The 300 Series switch also provides an improved contact rating over the previous version of 6A 125V/250VAC, and 6A 12/24VDC.

Applications include hydraulics and pneumatics, pumps and compressors, leak detection, tank monitoring, and water management.