Balluff BOS 18MR-PA-1HA-S4-C Diffuse Sensor

Balluff BOS 18MR-PA-1HA-S4-C (BOS0081) is an M18 cylindrical diffuse photoelectric sensor with background suppression that detects objects within a 40 to 120 mm range using triangulation. It uses a red LED light source and a divergent beam, delivering an 8 × 10 mm light spot at 100 mm to enable reliable sensing across varied backgrounds and surface colors. The sensing element is housed in brass with a nickel-plated finish and a glass sensing surface, in a compact package that measures 20 × 82 × 28 mm and uses a four-pin M12 connector. The device provides PNP switching with either normally open (NO) or normally closed (NC) outputs and operates on a 10–30 V DC supply. Balluff lists CE, cULus, and WEEE compliance for this model, aligning with common industrial installation requirements. As part of the BOS diffuse-sensor family, it offers background suppression to detect objects without being misled by nearby backgrounds, making it suitable for automation tasks where small parts must be distinguished from clutter.