Banner Engineering's QL55 Series of luminescence sensors display a simple, yet efficient model design. This series features a standard, effortless-setting push-button mechanism of the actual detecting apparatus, a 0-5.5V DC analogue output, interchangeable outputs (choice of PNP, or NPN), sensitive sensing technology, and an overall high product quality. This particular series is capable of sensing fluorescent markings on any type of material or surface (metal, glass, even ceramic), and even the luminophores of said material.