The Omron E39-R1S is the reflector used with E3Z retro-reflective photoelectric sensors such as the E3Z-R61 and E3Z-R81. It is the reflector the rated 4 m sensing distance is specified against.
A retro-reflective sensor is only as good as the reflector in front of it. The corner-cube surface of a proper reflector returns the beam along the exact path it arrived on, which is what lets the sensor distinguish its own light from everything else in the room. Substituting a mirror or a strip of reflective tape shortens the range and makes the sensor unreliable as soon as the alignment shifts.
Typical Applications
- Paired with E3Z-R series sensors on conveyors and packaging machines
- Replacement for a cracked, scratched or dirty reflector that is causing intermittent detection
- Installations where only one side of the conveyor can be wired
Installation Notes
Mount the reflector square to the sensor and check the alignment indicator on the sensor body. Keep the face clean: a film of dust or oil on the reflector reduces the returned light long before it becomes visible to the eye, and it is the most common cause of a retro-reflective sensor that works in the morning and fails by the afternoon.
Frequently Asked Questions
What is the Omron E39-R1S?
It is the standard reflector for E3Z retro-reflective photoelectric sensors, and the reference reflector for their rated sensing distance.
Which sensors use it?
E3Z retro-reflective models such as E3Z-R61 and E3Z-R81.
Can I use reflective tape instead?
It will work at short range but it reduces the sensing distance and the margin against misalignment. For a reliable installation use the specified reflector.
My retro-reflective sensor detects intermittently. Is the reflector the problem?
Very often, yes. Clean the reflector face and check the alignment first, before replacing the sensor.
