The SICK WTB11-2N2431 (Part No. 1041378) is a compact photoelectric proximity sensor with background suppression, designed to deliver reliable and precise object detection across a wide range of industrial applications. Belonging to SICK’s established WT11 series, this sensor integrates advanced optical technology with rugged construction, ensuring long-lasting and accurate performance.

Equipped with a visible red LED light source, the WTB11-2N2431 is capable of detecting objects with high precision while ignoring unwanted reflections from surrounding surfaces. The background suppression function ensures stable detection even when objects are positioned in front of shiny, reflective, or varying backgrounds. This feature is particularly valuable in packaging, printing, and assembly applications where reliable differentiation between products and their environment is essential.

The sensor offers a nominal sensing distance of 200 mm and a configurable detection range from 40 mm up to 500 mm. This flexibility allows it to be adapted to multiple use cases, from close-range detection to extended sensing tasks. The ability to finely adjust the detection distance ensures ease of integration into diverse industrial setups, reducing commissioning time and improving reliability.

The NPN switching output provides fast and accurate electrical signals for integration with automation and control systems that require NPN logic. With its quick response time, the WTB11-2N2431 is well-suited for applications involving moving objects, such as conveyors, sorting lines, or robotic handling systems. This ensures that even high-speed processes benefit from consistent detection and minimal error rates.

Mechanically, the WTB11-2N2431 is housed in a compact and durable plastic enclosure with IP67 protection rating, making it resistant to dust ingress and temporary exposure to water. Its robust construction supports reliable operation in harsh industrial environments. The compact design also ensures easy installation in tight spaces without compromising sensing capability.

On the electrical side, the sensor operates with a 10–30 V DC power supply and incorporates important protective features such as reverse-polarity protection and short-circuit resistance. These safeguards contribute to long-term durability, reducing downtime risks and minimizing maintenance requirements. The device connects easily via standard M12 industrial connectors, simplifying integration into existing machine systems.

Applications for the WTB11-2N2431 are diverse, including object presence detection, packaging verification, part positioning, and conveyor monitoring. Its combination of reliable detection performance, adjustable sensing distance, and rugged housing makes it a dependable solution for automation engineers and system integrators.

In summary, the SICK WTB11-2N2431 combines advanced background suppression, flexible range adjustment, and fast NPN switching in a compact IP67-rated housing. Its ability to deliver accurate and reliable detection in challenging conditions makes it an excellent choice for modern industrial automation environments.