All of Nason’s pressure switches feature a “no-creep” design with a snap-action electrical device activated by an elastomer diaphragm or piston. These adjustable vacuum switches maintain their contacts in either an open or closed state until a precise set point is reached. At that point, they snap over center to a new state and will remain there until vacuum pressure changes back over the set point, triggering the vacuum switches to snap back to their original state.

We offer both factory preset and adjustable pressure switches, with 1″ to 29″ vacuum models available and an operational life of over one million cycles under most operating conditions. Our adjustable vacuum switches offer a wide variety of electrical connection options and are fully customizable.