Block Style Switches PBT housing and sensing face 3 or 4 wire versions available 50 mm embeddable Operating temperature range –25 → +70°C Connections via terminal compartment LED status display Sensing Distances (mm) Mild Steel Stainless Steel Aluminium Copper 50 42.5 20 15 Block and Limit Switch Style All dc switches in this range have reverse polarity and short circuit protection. Embeddable versions can be flush mounted in metal.