SICK WL100-P3420 Photoelectric Sensor Proximity Switch

The SICK WL100-P3420 is a compact photoelectric retro-reflective sensor that detects targets using a reflected light beam across a sensing range from 0.01 m to 3 m, enabling reliable non-contact detection for a variety of inline automation tasks. It is part of SICK’s WL100/W100 family and uses a standard M8, 3-pin connector for wiring, which simplifies wiring and integration into controllers, a common configuration for small-footprint sensing in conveyors and packaging lines. The P3420 model designation identifies the specific optical configuration within the WL100 series, ensuring compatibility with replacement parts and the broader WL100 line. With a retro-reflective setup, the sensor relies on a reflector positioned opposite the sensor to create a regulated detection path, allowing consistent sensing across surfaces and minimal alignment adjustments when installed in tight spaces. This combination of a short to mid-range reach, compact form factor, and robust M8 connection makes the WL100-P3420 well-suited for compact installations where presence/absence signaling is required.