Sick WTB12-3P2431 Photoelectric Sensor
Sick WTB12-3P2431 is a photoelectric proximity sensor with 20–350 mm sensing range, PNP output, visible red LED support. This Sick photoelectric sensor from the W12 series uses background suppression optics, operates on 10–30 V DC, emits 640 nm red light with a 6 mm light spot, 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 | WTB12-3P2431 |
Sick WTB12-3P2431 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Sensing range max. | 20 mm ... 350 mm |
| Sensing range | 20 mm ... 350 mm |
| Polarisation filters | - |
| Light source | LED |
| Type of light | Visible red light |
| Light spot size (distance) | Ø 6 mm (200 mm) |
| Wave length | 640 nm |
| Adjustment | Potentiometer, 5 turns |
| Angle of dispersion | 2 x clamps BEF-KH-W12, incl. screws |
| Special applications | - |
| Items supplied | - |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | < 5 Vpp |
| Current consumption | 45 mA |
| Protection class | III |
| Digital Output type | PNP |
| Switching mode | Light/dark switching |
| Signal voltage PNP HIGH/LOW | > Uv - 2,5 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 WTB12-3P2431 Sick Photoelectric Proximity Sensor is designed for controlled object detection in industrial automation systems. It operates using background suppression with a 20–350 mm sensing range, a PNP digital output, and a visible red LED light source. The sensor runs on 10–30 V DC and belongs to the Sick W12 series, supporting stable detection tasks across standard industrial automation environments.
In practical applications, the WTB12-3P2431 Sick Photoelectric Proximity Sensor is used on conveyors, packaging equipment, automated assembly lines, and material handling systems. Background suppression enables accurate detection of target objects while minimizing influence from reflective backgrounds. The fast response time and defined switching frequency support consistent performance in high-speed automation processes, while the compact rectangular housing simplifies installation in limited spaces.
The WTB12-3P2431 from Sick combines defined optical behavior, 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 panels. As part of the W12 series, this Sick photoelectric sensor meets established industrial automation requirements where dependable proximity sensing and durability are essential.
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