PD45VN6C200Q - 

Pico-Dot Series Sensors
The Turck PD series of sensors are designed to be compact and lightweight which is ideal for use in robotic end effectors. The Pico-Dot Series are excellent for applications where high sensing power and a small beam size are important. This series of sensors operates over sensing ranges typically accomplished only by conventional opposed-mode photo-electrics and uses a special filter to polarize the emitted light light, filtering out unwanted reflections from shiny objects.