Sick WL12G-3O2431 Photoelectric Sensor

Built with autocollimation optics and a highly visible red LED light source, the Sick WL12G-3O2431 Photoelectric Sensor delivers reliable detection across a sensing range of up to 4 meters. It uses a focused Ø 25 mm light spot at 1.5 meters to detect objects with high precision, even those with shiny or transparent surfaces, thanks to its integrated polarization filter. The wavelength of 640 nm ensures clear alignment, while its 11-turn potentiometer provides granular adjustment for fine-tuning detection behavior in dynamic industrial environments.

Engineered for high-speed automation, this retro-reflective sensor supports a response time of ≤ 330 µs and a fast switching frequency of 1,500 Hz, ideal for detecting rapidly moving objects. It operates on a supply voltage of 10 V DC to 30 V DC with a low current consumption of 30 mA, and features a PNP digital output with light/dark switching functionality. Housed in a rugged zinc diecast rectangular enclosure measuring 15.6 mm × 48.5 mm × 42 mm, and protected to IP66, IP67, and IP69K standards, it withstands harsh operating conditions, including washdowns and dust. The M12, 4-pin connector ensures secure connectivity, while its capability to detect transparent objects makes it ideal for food & beverage lines, filling stations, and high-clarity packaging workflows.

The Sick WL4S-3F2130 Photoelectric Sensor is purpose-built for precise detection in tight industrial spaces. It is commonly used in assembly stations, miniature conveyor lines, and compact robotic arms where accurate positioning is crucial. Its compact form factor and sharp sensing capability help detect small, fast-moving parts without errors.

In electronic component assembly and pharmaceutical packaging, this sensor reliably detects caps, labels, or blister packs—even in cases with low reflectivity or cluttered backgrounds. Maintenance engineers prefer this model for its quick installation, minimal setup effort, and reliable results. For engineering students and junior technicians, the WL4S-3F2130 showcases how modern sensing technologies solve complex automation tasks with efficiency and speed—helping reduce downtime and improve process control.