What this sensor is for
The Omron E3FA-BP112M is a current-production M18 threaded retroreflective photoelectric sensor (E3FA series) with a 500 mm maximum sensing distance. It uses a visible red LED and a PNP output rated for 100 mA. The key feature is the P-Opaquing function, which can detect transparent objects like glass plates or clear film — applications where standard retroreflective sensors false-trigger. Response time is 0.5 msec, fast enough for high-speed packaging or bottling lines. The sensor body is plastic, rated IP67 and IP69K, so it will survive high-pressure hot-water washdown in food or beverage environments. Supply voltage is 10–30 VDC; the prewired 2 m cable (Bare Wire) connects directly to your control cabinet. An amber indicator light confirms target detection. The selectable Light On/Dark On switching mode lets you match the output logic to your PLC input. For transparent targets with the P-Opaquing function, set to Dark On — the sensor outputs when the light beam is restored (i.e., no object present), which filters out surface reflections.
Lifecycle and sourcing reality
Compliance documentation includes CE marking. We do not have RoHS or UL specific certificates; if your incoming inspection requires those, request them with your RFQ.
Mounting and wiring notes
The M18 threaded barrel (18 mm) mounts via an M18 bracket. Overall length is 41 mm. The 2 m prewired cable has three leads—brown, blue, and black (PNP output). The minimum detectable object is a 150 mm x 150 mm glass plate — that's the test reference for the P-Opaquing function. For smaller transparent targets, you may need a retroreflective sensor with a focused beam (different variant). The sensing distance on opaque objects (with a standard reflector) is also 500 mm; the 100 mm minimum applies when using the P-Opaquing feature on close-range clear targets. Set the switching mode via the internal DIP switch (accessible by removing the cap). Light On: output turns on when the beam is interrupted (opaque object). Dark On: output turns on when the beam is restored (clear object). For transparent detection, Dark On is mandatory.