Sick WL4S-3P2232 Photoelectric Sensor

The WL4S-3P2232 model from Sick is engineered with a photoelectric retro-reflective sensing principle enhanced by autocollimation, enabling stable detection even in dusty or reflective environments. Its sensing range reaches up to 3 meters under standard conditions, and 5 meters with optimized reflectors. The PinPoint LED emits a visible red light at 650 nm with a precise Ø 45 mm spot size at 1.5 meters, making alignment and visual verification simple and efficient on shop floors.

This sensor supports light/dark switching using a PNP digital output, and reacts rapidly with a < 0.5 ms response time and a high 1,000 Hz switching frequency, which is essential for fast-moving automation lines. It operates on a 10–30 V DC supply with low 20 mA current consumption, supporting energy efficiency across multiple installations. The sensor body is housed in a slim rectangular ABS enclosure with a front screen made of PMMA, providing IP66/IP67 protection. This rugged build supports reliable operation across harsh environments, withstanding temperatures from –40 °C to +60 °C. The M8 4-pin male connector simplifies integration into control systems and cable harnesses.

In real-world applications, the WL4S-3P2232 Photoelectric Sensor plays a key role in enhancing operational efficiency and reducing downtime. On automated packaging lines, it ensures accurate counting and positioning of boxes or bottles before sealing. In materials handling, it detects totes or trays on high-speed conveyors with exceptional reliability. Its compact size makes it ideal for mounting on robotic arms or inside tight machinery where space is limited. Junior and senior maintenance engineers trust it for its consistency and low maintenance requirements, while engineering students learn from its real-world design principles and visible light feedback. With Sick’s proven engineering behind it, the WL4S-3P2232 stands as a dependable, field-ready sensor trusted across Indian factories and automation setups.