Eaton's Cutler-Hammer E51 Series sensor families combine high performance with a familiar limit switch style housing. Modular, plug-in components provide application flexibility, ease of maintenance, less downtime and reduced inventory. Choose from 2-wire sensors with AC/DC operation, or 4-wire sensors in either AC or DC styles. Connection options include terminal, mini-connector or various length of cable. The E51 Series can be built to sense metals at shorter ranges (inductive sensing) or just about any material at longer ranges (photoelectric sensing), depending on the head component chosen. Features ?Rugged Construction is Ideal for Industrial Environments ?Viton? Gaskets Ensure a Positive Seal and High Resistance to Industry Chemicals ?Direct Replacement for Worn Out Limit Switches ?Sensor Heads and Bodies Feature Captive Screws to Eliminate Loss ?All Sensor Heads Include a Selector Switch to Program Output Function to Either N.O. or N.C. ?Sensor Bodies Feature Bifurcated Engagement Prongs for a Reliable Connection When Plugging into Receptacle Stabs ?Engagement Key Between Sensor Body and Receptacle Prevents Improper Assembly ?Sensors Accommodate Both U.S. and DIN Mounting Dimensions ?Wiring Terminals Feature Captive Pressure Plate Saddles for #18 to #12 AWG Wire. A Green Screw Identified Ground Terminal is Also Included ?Logic Modules Are Available to Provide Additional Control Functions ?Inductive Sensing Heads for Detecting Metal at Up to 24 mm (0.94 In.) and Photoelectric Sensing Heads for Detecting Targets at Up to 90 m (300 Ft.) ?UL Listed, CSA Certified, CE (on Some Models)