Highly refined optics for long sensing ranges and to see through high levels of contamination unmatched optical performancePerfect Prox® technology provides exceptional background rejection and extremely high excess gainResistant to the wide range of chemicals used in the automotive, food processing and forest products industriesSuitable for high temperature, high pressure washdown (1200 psi)Mechanical Viton® seals hold up to extreme temperature variationsVisible sensing beam on all models lets you see where the beam is aimed for quick setup and alignmentOutput status indicator is the brightest available and is visible from any angle and in any lighting conditionThe industry's only background rejection sensors with a 2-wire circuit designModels available with both AC and DC operation in a single unit4-wire DC sensors offer dual NPN and PNP outputs303 stainless steel enclosure