Highly visible LED indicators for power, output and TargetLock™TargetLock™ simplifies setup and ensures the sensor operates at the highest level of reliability possiblePerfect Prox® models sense different colored targets at the same range and ignore objects in the backgroundDC only models feature both NPN and PNP outputsVisible beam on all models lets you see exactly where the sensor is pointingCompact size to fit in tight spacesMultiple mounting options including industry standard 18 mm threadsReverse polarity, overload and short circuit protectionFull family includes through beam, polarized reflex, diffuse reflective and Perfect Prox® background rejectionRight angle viewing models mount in a depth of only 6/10th of an inch