Sick WTB12-3N2431 Photoelectric Sensor
The Sick WTB12-3N2431 is a photoelectric proximity sensor with background suppression, 350 mm sensing range, and NPN output type. This Sick photoelectric sensor operates on 10–30 V DC, uses visible red LED light at 640 nm, supports 1,500 Hz switching frequency, and belongs to the W12 series for industrial automation.
| Brand | Sick |
| Product Type | Photolectric Sensor |
| Model Number | WTB12-3N2431 |
Sick WTB12-3N2431 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 | - |
| 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 | 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 WTB12-3N2431 Sick 45 mA Current Photoelectric Sensor is a Sick photoelectric sensor designed for controlled short-range detection in industrial automation. This model uses background suppression technology with a 20–350 mm sensing range, visible red LED at 640 nm, and NPN digital output. Operating at 45 mA current consumption on 10–30 V DC, the WTB12-3N2431 is part of the Sick W12 series used in automated systems.
The WTB12-3N2431 Sick 45 mA Current Photoelectric Sensor is applied in conveyors, packaging equipment, automated assembly lines, and material handling systems. Its 330 µs response time and 1,500 Hz switching frequency enable reliable object detection while suppressing background surfaces. The defined light spot size and potentiometer adjustment support stable sensing where precise proximity control is required.
The WTB12-3N2431 from Sick provides consistent optical detection for continuous industrial use. With background suppression functionality, visible red light emission, and high IP-rated enclosure protection, this Sick photoelectric sensor supports dependable operation in demanding environments. As a W12 series device, the WTB12-3N2431 is suitable for applications requiring electrical stability, environmental resistance, and repeatable detection across production processes.
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