Dwyer F6-HPS-31 is a general-purpose level switch designed for use with compatible liquids. It has an enclosure rating of general purpose and can withstand temperatures ranging from -4 to 257°F (-20 to 125°C). The switch features a hermetically sealed SPST reed switch that is reversible for normally open or normally closed operation. It has a pressure limit of 116 psi (8 bar) and is equipped with wire leads that are 22 AWG and 11.811" (300mm) long. The switch can be mounted vertically or horizontally with an index arrow pointing up or down, depending on the model. Wetted materials vary depending on the model.