Sick WTF12-3N2431 Photoelectric Sensor
Sick WTF12-3N2431 is a photoelectric proximity sensor with foreground suppression, 30–175 mm sensing range, NPN output for industrial automation. This Sick photoelectric sensor from the W12 series uses visible red LED light at 640 nm with a 2 mm light spot, 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 | WTF12-3N2431 |
Sick WTF12-3N2431 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Foreground suppression |
| Sensing range max. | 30 mm ... 175 mm |
| Sensing range | 30 mm ... 175 mm |
| Polarisation filters | - |
| Light source | LED |
| Type of light | Visible red light |
| Light spot size (distance) | Ø 2 mm (60 mm) |
| Wave length | 640 nm |
| Adjustment | Potentiometer, 5 turns |
| Angle of dispersion | - |
| Special applications | Detecting flat objects |
| Items supplied | 2 x clamps BEF-KH-W12, incl. screws |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | < 5 Vpp |
| Current consumption | 45 mA |
| Protection class | III |
| Digital Output type | NPN |
| Switching mode | Light/dark switching |
| Signal voltage PNP HIGH/LOW | Approx. VS / < 2.5 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 WTF12-3N2431 Sick Foreground Suppression Sensor is a photoelectric proximity sensor designed for controlled object detection in industrial automation systems. It operates with foreground suppression, a 30–175 mm sensing range, and an NPN digital output using a visible red LED light source. The sensor runs on 10–30 V DC and belongs to the Sick W12 series, supporting accurate proximity sensing tasks in automated environments.
In industrial applications, the WTF12-3N2431 Sick Foreground Suppression Sensor is used on conveyors, packaging machines, automated assembly lines, and inspection stations. Foreground suppression enables reliable detection of flat or low-contrast objects while reducing background influence. The fast response time and defined switching frequency support stable operation in continuous processes, and the compact rectangular housing allows straightforward installation in space-limited automation layouts.
The WTF12-3N2431 from Sick combines defined optical control, electrical stability, and mechanical protection for dependable industrial use. With NPN output compatibility, wide operating temperature tolerance, and high enclosure ratings, it integrates reliably into standard industrial control systems. As part of the W12 series, this Sick photoelectric sensor meets established industrial automation requirements where consistent proximity sensing and long-term durability are required.
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