Many procurement teams check WTB4S-3P2131 against Sick Laser Sensor, Sick Gtb6 P1211 and P&F Photoelectric Sensor before signing purchase orders, verifying quality, compliance, and after-sales support availability.
Sick WTB4S-3P2131 Photoelectric Sensor
The Sick WTB4S-3P2131 Photoelectric Sensor offers a Rectangular design, 650 nm sensing range, PinPoint LED light source, NPN output, and β40 Β°C ... +60 Β°C connection. Manufactured by Sick under the Sick Photoelectric Sensor category, this model belongs to the WL Series.
| Brand | Sick |
| Product Type | Photoelectric Sensor |
| Model Number | WTB4S-3P2131 |
Sick WTB4S-3P2131 Photoelectric Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric retro-reflective sensor |
| Functional principle detail | Background suppression |
| Sensing range max. | 4 mm ... 120 mm |
| Sensing range | 10 mm ... 120 mm |
| Light source | PinPoint LED |
| Type of light | Visible red light |
| Light spot size (distance) | Γ 2.5 mm (50 mm) |
| Wave length | 650 nm |
| Adjustment | Potentiometer, 5 turns |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | < 5 Vpp |
| Current consumption | 20 mA 3) |
| Protection class | III |
| Digital Output type | NPN |
| Switching mode | Light switching |
| Output current Imax. | β€ 100 mA |
| Response time | < 0.5 ms |
| Switching frequency | 1,000 Hz |
| Housing | Rectangular |
| Design detail | Slim |
| Dimensions (W x H x D) | 12.2 mm x 41.8 mm x 17.3 mm |
| Connection | Connector M8, 3-pin |
| Housing material | Plastic, ABS |
| Front screen material | Plastic, PMMA |
| Enclosure rating | IP67, IP66 |
| Ambient operating temperature | β40 Β°C ... +60 Β°C |
| Ambient temperature, storage | β40 Β°C ... +75 Β°C |
| Weight | 30 g |
The WTB4S-3P2131 Photoelectric Sensor from Sick leverages advanced retro-reflective sensing with background suppression to detect objects accurately in close proximity to reflectors, without false triggers from the background. It offers a sensing range of 10 mm to 120 mm and a tight light spot of Γ 2.5 mm at 50 mm, making it ideal for pinpoint part detection in confined spaces. Powered by a PinPoint LED with visible red light at 650 nm, this sensor enables quick visual alignment during installation and maintenance. The device is tuned using a 5-turn potentiometer, giving precise control over sensing distance in fast-paced production lines.
Engineered to run on a 10β30 V DC supply with only 20 mA current consumption, it supports a NPN digital output and operates in light switching modeβideal for integration into standard PLC and automation control systems. With a response time of less than 0.5 ms and a fast 1,000 Hz switching frequency, this sensor ensures zero lag detection of rapidly moving targets. Housed in a slim, durable ABS plastic body and equipped with a tough PMMA front screen, it carries an IP66/IP67 enclosure rating and is designed to withstand temperatures from β40 Β°C to +60 Β°C. Its compact size (12.2 mm Γ 41.8 mm Γ 17.3 mm) and M8 3-pin connector allow seamless mounting even in densely packed control cabinets or machinery.
The Sick WTB4S-3P2131 is the go-to sensor for precision detection of components in pick-and-place systems, quality checks in packaging machines, and product presence verification on short conveyors. Thanks to background suppression, it performs well even in situations where shiny machine parts or close background surfaces could interfere. For maintenance engineers, its robust housing and no-hassle teach-in offer long-term reliability, while for junior technicians and students, it serves as a solid learning example of how modern sensors differentiate between foreground and background using intelligent optical techniques. From durability to precision, this Photoelectric Sensor by Sick is a trusted tool across manufacturing plants that demand accuracy without compromise.
