The LK-G502 from Keyence Deutschland is a Laser Displacement Sensor with Measure/Sensing Distance 500 mm (Diffuse), 497.5 mm (Specular), Wavelength 655 nm, Sampling Rate 20 µs, 50 µs, 100 µs, 200 µs, 500 µs, 1000 µs, Repeatability 2 µm, Laser Power 0.95 mW. More details for LK-G502 can be seen below.