SICK GTB10-P5221S21 Photoelectric Diffuse Sensor

SICK GTB10-P5221S21 is a compact diffuse photoelectric sensor with background suppression for reliable presence detection on small targets. Housed in a rectangular 20 × 50 × 39 mm body, it uses an 850 nm infrared LED to sense objects from 20 mm up to 1,200 mm (target reflectivity and background lighting affect actual range). The sensor delivers a PNP switching output via a 1.2 m three-wire cable, making it suitable for DC control circuits on conveyors, packaging lines, and pick-and-place stations. A 5-turn potentiometer provides adjustment, and the device supports diffuse mode with background suppression (notably effective on white or light targets with 90% remission per DIN 5033). The light spot is about Ø22 mm at a distance of 700 mm, and the unit is designed for long service life, rated at up to 100,000 hours at +25 °C. The part number is 1111570, and the model is identified in SICK’s GTB10 family as GTB10-P5221S21, with a DC supply and robust rectangular housing for industrial environments.