Vacuum Switch Vpev-W-S-Led-Gh for Mounting On G orH Rail. Authorisation=Rcm Mark, Ce Mark (See Declaration of Conformity) =To Eu Directive for Emc, Materials Note= (* Contains Pwis Substances, * Conforms to Rohs) , Measured Variable=Relative Pressure, Measurement Method=Pneu./Elect. Pressure Transducer