The VDM18-300/32/105/122 from Pepperl+Fuchs is a Laser Displacement Sensor with Measure/Sensing Distance 80 to 300 mm, Wavelength 650 nm, Response Time 0.4 ms, Resolution <0.1%, Supply Voltage 18 to 30 VDC. More details for VDM18-300/32/105/122 can be seen below.