Leuze hrtr 46b diffuse reflection light sensor background suppression leuze electronic 50106555 a diffuse reflection light sensor using a visible red light as the led source a multiturn potentiometer allows precise adjustment of the wide sensing range and performance is enhanced by background suppression and a sup2 ls active ambient light suppression excellent detection of surfaces from light to dark as well as inclined or sloped surfaces leuze electronic 50106555 hrtr 46b 66 s12 light s