Sick WTB12-3N1111 Photoelectric Sensor
Sick WTB12-3N1111 is a photoelectric proximity sensor with 20–600 mm sensing range and NPN complementary output for industrial automation. This Sick photoelectric sensor from the W12 series uses background suppression with 850 nm infrared LED, operates on 10–30 V DC, supports light/dark switching, provides ≤330 µs response time at 1,500 Hz, and features IP66/IP67/IP69K protection with a fixed 2 m cable connection.
| Brand | Sick |
| Product Type | Photolectric Sensor |
| Model Number | WTB12-3N1111 |
Sick WTB12-3N1111 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Sensing range max. | 20 mm ... 600 mm |
| Sensing range | 20 mm ... 600 mm |
| Polarisation filters | - |
| Light source | LED |
| Type of light | Infrared light |
| Light spot size (distance) | 15 mm x 15 mm (200 mm) |
| Wave length | 850 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 | 55 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 | Cable, 4-wire, 2 m |
| 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 | 200 g |
The WTB12-3N1111 Sick Complementary Photoelectric Sensor is designed for reliable proximity detection in industrial automation systems. It operates using background suppression with a 20–600 mm sensing range, an NPN complementary output, and an 850 nm infrared LED. The sensor runs on 10–30 V DC and belongs to the Sick W12 series, supporting stable object detection across automated production environments.
In practical applications, the WTB12-3N1111 Sick Complementary Photoelectric Sensor is used in conveyors, packaging lines, automated assembly stations, and material handling systems. Background suppression enables consistent detection of objects while minimizing background interference. The fast response time and defined switching frequency support dependable performance in continuous processes, while the rectangular metal housing withstands demanding industrial conditions.
The WTB12-3N1111 from Sick combines controlled optical sensing, electrical stability, and mechanical protection for long-term industrial operation. With NPN complementary output, wide operating temperature tolerance, and high enclosure ratings, it integrates reliably into standard control systems. As part of the W12 series, this Sick photoelectric sensor meets established industrial automation requirements where accurate proximity sensing and durable construction are required.
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