SICK WL4-3P3130 Photoelectric Sensor

Compact and reliable, the SICK WL4-3P3130 is a retro-reflective miniature photoelectric sensor in the W4 family that detects presence by returning emitted light from a dedicated reflector. It uses a PinPoint LED at 650 nm (visible red) and covers a sensing range from 0.01 m up to 4.5 m when paired with the PL80A reflector, with a light spot of about Ø75 mm at 2 m to support alignment. The dual-lens design enhances sensing stability across varying targets, and the unit lists adjustment as none, simplifying setup. The WL4-3P3130 is a 3-wire PNP-output variant, identified by the 3P3130 suffix, and is intended for compact applications in automation, packaging lines, conveyors, and machine tooling where short-to-medium range presence/absence detection is required. For best results, pair with the PL80A reflector as specified by SICK to ensure reliable performance in typical industrial environments.