The Omron E3FADN21OMI is a diffuse reflective photoelectric sensor from the E3FA series, delivering reliable presence detection up to 100 mm with a 500 µs response time. Its NPN output and M12 4-pin connector make it a straightforward pick for PLC input cards in automated lines. Operates on 10–30 VDC with selectable Light-ON/Dark-ON switching. IP67/IP69K rating allows use in high-pressure washdown environments.
Sensing Distance Comparison with E3FADN22OMI
The E3FADN22OMI shares the same 16.6 mm width, NPN output, M12 connector, and IP ratings as this sensor. The critical difference is sensing distance: the E3FADN22OMI detects at 300 mm, three times farther than the 100 mm of this model. Choose the E3FADN21OMI when your target is consistently within 100 mm and a shorter detection zone reduces false triggers from background objects. Because the mounting footprint and connector are identical, swapping between the two sensors on the same bracket requires no rewiring – only a sensitivity adjustment to match the new range.
Form Factor & Wiring
Measures 16.6 mm wide and 45 mm long. Equipped with an M12 4-pin connector, NPN output, and selectable Light-ON/Dark-ON switching. The IP69K rating withstands high-temperature, high-pressure washdown cycles common in food and beverage lines. Operating temperature range from -25 °C to 55 °C covers most indoor factory environments.