Sensor overview and key ratings
The Omron E3Z-R61K is a retro-reflective photoelectric sensor with built-in amplifier, using a red LED (660 nm). Sensing distance is 3 m (150 mm); pre-wired 2 m cable; current consumption 30 mA max.
How it compares to nearby siblings
The E3Z-D81K uses an infrared LED (860 nm) and a wide-view retro-reflective method with a sensing distance of 5 to 100 mm, making it unsuitable for the 3 m range the E3Z-R61K covers. The E3Z-R81K shares the exact same specs (red LED, 3 m range, pre-wired 2 m cable, 30 mA) under a different order code.