These compact flat-pack photoelectric sensors can detect objects at small to medium ranges in confined locations and are resistant to aggressive cleaning agents, chemicals, coolants or other media. Their fully enclosed stainless steel housing has an IP67/IP69K rating, which means they can withstand demanding environments. The sensors are available in multiple versions: diffuse with ranges up to 100 mm, polarized retroreflective with ranges up to 1 m and through-beam with ranges up to 2.2 m. With a precise, uniform visible red-light beam, alignment is easy.