Omron E3JK-R4M1 Photoelectric Switch 90-250VAC with Reflector
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Prices updated: 14 Oct 2026
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About this product
An AC-powered retro-reflective photoelectric switch that works with a reflector and detects an object when it interrupts the light beam. It has a 200 cm detection range and is used in AC automation, conveyor counting and presence detection.
Specifications
- Supply voltage
- 90-250 VAC
- Sensing type
- Retro-reflective (with reflector)
- Detection distance
- 200 cm
- Output
- Relay
Frequently asked questions
How do I connect it to an Arduino?
Do not connect the 90-250 V AC supply or the load to the Arduino. Use the relay contact to switch a separate circuit, or place an isolating relay or optocoupler module between the output and the Arduino input.
Does it need a reflector?
Yes. In retro-reflective mode the sensor needs a reflector aligned opposite it. An object is detected when it breaks the beam between the sensor and the reflector.
