The Model 31 Pressure Switch is perfect for switching pressure ranges up to 50 bar. It offers a choice of normally open or normally closed contacts (SPST), and has adjustment range options of 0.1 – 1 bar, 0.2 – 2 bar, 1 – 5 bar, 1 – 10 bar, 10 – 20 bar or 20 - 50 bar. The max working pressure is 150 bar, with an over pressure limit of 300 bar. The max switching voltage is 250 volts and the operating temperature range is -10°C to 120°C with a Viton diaphragm (other diaphragm options are available). The standard material option is zinc plated steel but brass or stainless steel are also available as options.