The LDI-50-5 from WayCon Positionsmesstechnik is a Laser Displacement Sensor with Measure/Sensing Distance 0.05 to 50 m (natural surface), 40 to 50 m (reflective foil), Wavelength 620 to 690 nm, Repeatability ±900 to ±1800 µm, Supply Voltage 12 to 30 VDC, Laser Power 1 mW. More details for LDI-50-5 can be seen below.