Sick WL12-3P2431 Photoelectric Sensor
Sick WL12-3P2431 is a retro-reflective photoelectric sensor with 7 m sensing range and PNP output support in industrial automation. This Sick photoelectric sensor from the W12 series uses autocollimation optics, polarisation filters, visible red LED at 640 nm, operates on 10–30 V DC, supports light/dark switching, delivers ≤330 µs response time at 1,500 Hz, and features IP66/IP67/IP69K protection with an M12 4-pin metal housing.
| Brand | Sick |
| Product Type | Photolectric Sensor |
| Model Number | WL12-3P2431 |
Sick WL12-3P2431 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric retro-reflective sensor |
| Functional principle detail | Autocollimation |
| Sensing range max. | 0 m ... 7 m |
| Sensing range | 0 m ... 5 m |
| Polarisation filters | Yes |
| Light source | LED |
| Type of light | Visible red light |
| Light spot size (distance) | Ø 100 mm (3 m) |
| Wave length | 640 nm |
| Adjustment | Potentiometer, 5 turns |
| Angle of dispersion | Approx. 1.5° |
| Special applications | - |
| Items supplied | 2 x clamps BEF-KH-W12, incl. screws |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | < 5 Vpp |
| Current consumption | 30 mA |
| Protection class | III |
| Digital Output type | PNP |
| Switching mode | Light/dark switching |
| Signal voltage PNP HIGH/LOW | > Uv - 3 V / ca. 0 V |
| Output current Imax. | ≤ 100 mA |
| Response time | ≤ 330 µs 4) |
| Switching frequency | 1,500 Hz 5) |
| Output function | Complementary |
| Special feature | - |
| Housing | Rectangular |
| Dimensions (W x H x D) | 15.6 mm x 48.5 mm x 42 mm |
| Connection | Male connector M12, 4-pin |
| Housing material | Metal |
| Front screen material | Plastic, PMMA |
| Enclosure rating | IP66, IP67, IP69K |
| Ambient operating temperature | –40 °C ... +60 °C |
| Ambient temperature, storage | –40 °C ... +75 °C |
| Weight | 120 g |
The WL12-3P2431 Sick 7m Retro-reflective Sensor is a photoelectric sensor designed for consistent object detection in industrial automation systems. It operates with a maximum sensing range of 7 m, a PNP digital output, and a visible red LED light source using autocollimation optics. The sensor runs on 10–30 V DC and belongs to the Sick W12 series, supporting standard automation detection requirements.
In industrial environments, the WL12-3P2431 Sick 7m Retro-reflective Sensor is used on conveyors, packaging machines, automated assembly lines, and material handling systems. The retro-reflective operating principle with polarisation filters enables reliable detection even in reflective surroundings. Fast response time and a defined switching frequency support stable performance in high-speed automation processes, while the compact rectangular housing allows flexible installation.
The WL12-3P2431 from Sick combines defined optical performance, electrical stability, and mechanical protection for long-term industrial use. With PNP output compatibility, wide operating temperature tolerance, and high enclosure ratings, it integrates reliably into industrial control systems. As part of the W12 series, this Sick photoelectric sensor meets established industrial automation requirements where dependable sensing and operational consistency are required.
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