Specifically engineered for use in the oil and petrochemical industries, this stainless steel sensor is completely sealed and explosion-proof. Low impedance allows for transistor circuit input. When mated with conduit, it provides positive protection against damage due to water, high humidity, oil, dirt, dust, or corrosive liquids. UL and CSA listed for Class I-Group C & D hazardous locations. Class II-Group E, F, & G.