Pressure Switch Pev-1/4-Sc-Od Opens orCloses An Electrical Circuit When a Certain Pressure Value Is Reached. Adjustable Pressure Switching Point. without Electrical Socket. Conforms to Standard=En 60947-5-1, Authorisation=Ccc, Ce Mark (See Declaration of Conformity) =To Eu Directive Low-Voltage Devices, Materials Note=Conforms to Rohs, Measured Variable=Relative Pressure