The LDI-500-3-250 from WayCon Positionsmesstechnik is a Laser Displacement Sensor with Measure/Sensing Distance 0.05 to 100 m (natural surface), 0.5 to 500 m (reflective foil), Wavelength 620 to 690 nm, Repeatability ±350 to ±700 µm, Supply Voltage 12 to 30 VDC, Laser Power 1 mW. More details for LDI-500-3-250 can be seen below.