SICK WT27L-2F430A Photoelectric Proximity Sensor

The SICK WT27L-2F430A is a compact, background-suppressed photoelectric proximity sensor that delivers reliable detection of small parts over a 100 to 800 mm range. It uses a laser-based 650 nm visible red light with a 2 mm light spot at 400 mm, enabling precise sensing of small objects with high contrast. The rectangular housing measures 24.6 mm wide by 80 mm high by 53.5 mm deep, and the unit is configured for 10–30 V DC operation with a PNP output and a 4-pin M12 male connector, allowing straightforward integration into standard control circuits. Sensitivity is adjustable via a front-mounted potentiometer, and the device carries a Laser Class 2 rating under EN 60825-1, with an average service life of about 50,000 hours at +25 °C. In addition to general object presence sensing, it supports detecting small objects with up to 90% reflectivity, making it suitable for applications on conveyors, feeders, and pick-and-place tasks where reliable discrimination of small parts is required. The WT27L family is designed for industrial environments that demand compact form factor and dependable background suppression in compact sensing layouts.