Leuze electronic krtl 3b 4 3111 s8 red laser contrast scanner leuze electronic 50110592 a contrast scanner that uses a red laser light to produce a small light spot that can precisely detect and compare contrast differences and output the results with minimal signal jitter the sensor employs static 2 point teach in and features remote teach keyboard lockout and pulse stretching via pin 2 switching threshold can be adjusted using easytune via the teach button leuze electronic 50110592 krtl