Photoelectric Sensors
SICK WL12G-3O2431 Photoelectric sensor
SICK WL12G-3O2431 retro-reflective photoelectric sensor, part 1041457. Compact W12 housing with autocollimation optics for conveyor and packaging detection.
Overview
The SICK WL12G-3O2431 (part number 1041457) is a small retro-reflective photoelectric sensor from the W12 housing family. It detects objects that interrupt the light beam returned from a reflector, making it a space-saving single-sided solution for medium-range object detection on conveyors and packaging machines.
How It Works
Emitter and receiver are built into one housing. The autocollimation optics return the beam from a corner-cube reflector along almost exactly the same path, so sensor and reflector alignment is straightforward even over longer distances. When an object blocks the returned light, the output switches.
Key Features
- Retro-reflective detection with a single-sided mounting position
- Autocollimation optics simplify alignment with the reflector
- Compact W12 housing for use on densely equipped machines
- Greater dirt tolerance than diffuse sensors thanks to the double light path
- Object detection independent of target color and surface
- Light-ON and Dark-ON switching selectable for control integration
Typical Applications
- Box and carton detection on conveyor lines in packaging plants
- Product presence checks at machine infeeds and outfeeds
- Monitoring oftransport trolleys on overhead conveyors
- Object detection in warehousing and intralogistics systems
- Flap and cover position monitoring with a reflector opposite
Specifications
Attribute | Value |
|---|---|
Model | SICK WL12G-3O2431 |
Part number | 1041457 |
Detection principle | Retro-reflective photoelectric (autocollimation) |
Housing family | W12 compact rectangular |
Required accessory | Corner-cube reflector |
Installation and Setup Notes
Mount the reflector rigidly opposite the sensor and align until the returned signal is strong and stable. Avoid applications where the target is highly reflective and flat, as it can act like a mirror and return the beam even while blocking the reflector path; use a polarizing-filter version or through-beam pairing for such targets. Inspect the reflector periodically and wipe it clean in dusty conditions.
Frequently Asked Questions
What accessory does this sensor require?
A corner-cube reflector mounted opposite the sensor. The reflector returns the emitted beam to the receiver.
Why choose retro-reflective over diffuse detection?
Retro-reflective sensors reach longer distances, detect targets independent of their color, and tolerate dust and dirt on the optics better.
Can the sensor be used outdoors?
The housing is sealed for industrial environments, but strong direct sunlight can reduce contrast, so shading or careful orientation is recommended in outdoor installations.
Related Photoelectric Sensors
For a more compact retro-reflective unit, see the SICK WL4SL-3P3232. For a diffuse W12 sensor without reflector, see the SICK WTB12-3P2431.
