Sick WL4SL-3P3232 Photoelectric Sensor

The WL4SL-3P3232 Photoelectric Sensor by Sick combines retro-reflective sensing with advanced autocollimation to achieve superior detection accuracy. With a maximum sensing range of 12 meters and a reliable operational range of 0 to 8 meters, it is built for long-distance applications. The sensor uses a sharp laser light source emitting visible red light at 650 nm, focused into a precise 1 mm spot at 500 mm, enabling accurate detection of very small or reflective objects without interference. This is especially critical in high-speed assembly and part-checking operations where misdetection is costly.

It features a PNP digital output with light/dark switching and operates at a rapid 1,000 Hz switching frequency with a swift response time of less than 0.5 ms. The 10–30 V DC supply ensures compatibility with industrial control systems while maintaining low 30 mA current consumption. Its slim 12.2 mm × 41.8 mm × 17.3 mm rectangular housing is made of rugged Novodur plastic, paired with a PMMA front screen, and sealed to IP66/IP67 standards—perfect for harsh industrial and dusty environments. The M8 4-pin cable connector offers secure and quick integration with existing wiring infrastructure.

The WL4SL-3P3232 excels in precise part detection, pallet tracking, and positioning tasks where other sensors may struggle. In automotive and electronics plants, it is used to verify presence of clips, washers, or small components before the next process stage. In conveyor systems, it ensures items are correctly aligned for printing, labeling, or scanning. For maintenance engineers, it minimizes downtime with its quick teach-in adjustment and low-maintenance design. For engineering students, it serves as a real-world example of how optics, electronics, and control systems work together in industrial sensing. With proven German engineering and Sick’s global reliability, this laser Photoelectric Sensor is a powerful upgrade for smart factories across India.