The RF603HS-X/5 from Althen Sensors & Controls is a Laser Displacement Sensor with Measure/Sensing Distance 5 mm, Wavelength 660 nm, 405 nm, Sampling Rate 70 kHz, Supply Voltage 9 to 36 V, Laser Power <4.8 mW. More details for RF603HS-X/5 can be seen below.