SICK WL27-3P3402S21 Reflex Array Photoelectric Sensor

The SICK WL27-3P3402S21 Reflex Array Photoelectric Sensor is a compact retro-reflective array that delivers fast, reliable edge detection for irregular or small objects on conveyors and sorting lines. The rectangular housing measures 24.6 mm wide by 80 mm high by 54.2 mm deep, and the device targets objects as small as 2 mm within its light array, with a sensing range from 0 m up to 1.5 m and reflector distance of 0.5 to 1.5 m when used in reflex mode with a reflector such as PL40A. It uses visible red light with a PinPoint LED to aid alignment, and offers straightforward setup via a single teach-in button. AutoAdapt automatically tunes the switching threshold, and Continuous Threshold Adjustment (CTA) further reduces downtime in dusty or contaminated environments. The WL27-3 family is designed to identify objects across a defined light band; this model, part number 1061706, is specified as WL27-3P3402S21, a reflex array sensor that can detect transparent, perforated, uneven, and shiny objects, as well as parts with positional tolerances, within its detection zone. Typical applications include packaging and sorting lines, tote and pallet handling, and other high-speed production environments where a single compact sensor can replace multiple discrete detectors, simplifying installation while preserving reliable edge-detection performance.