The ProtEX-MAX series is a design that takes the standard Precision Digital meters and integrates them into a sleek explosion-proof enclosure. The design allows you to safely operate and program the unit through the glass window without opening the enclosure. Models available in the ProtEX-MAX series are ProVu, Trident X2, Snooper and Vigilante II. Full CSA approval with temperature rating down to -40 C.