The Omron E2E-S05S12-WC-C1 is a shielded small-diameter proximity sensor with a 1.2 mm sensing distance, in a 5 mm threaded SUS stainless steel cylindrical body. It outputs a DC 3-wire NPN normally open signal through a PVC pre-wired cable, making it a tight-fit detection solution for confined spaces where ferrous targets need reliable presence sensing.
What the ratings mean for fit
The 1.2 mm sensing distance is the flush-mount rated gap to a standard mild steel target. In a panel or machine frame, that means the sensor face must sit within 1.2 mm of the target at closest approach — any farther and the output may not switch reliably. The shielded construction allows flush mounting in metal without derating the sensing distance, which is the typical case for this class of sensor. The 5 mm threaded body uses an M5 thread form, so it fits standard 5 mm mounting holes and locknuts. The SUS stainless steel case resists corrosion in washdown or humid environments, though the IP rating (not listed here) should be verified against the specific washdown cycle. The PVC pre-wired cable is a fixed 2-meter lead — no connector option, so plan for a junction box or flying-lead termination. NPN normally open output means the sensor pulls the output line low when a target is detected. This is standard for sinking PLC inputs common in Asian-origin control systems. If your input card expects a PNP sourcing signal, this sensor will not interface directly without a level-shifter or relay.