The AR700-0250 from Acuity Laser is a Laser Displacement Sensor with Measure/Sensing Distance 6.35 mm (Span), Wavelength 650 nm, Sampling Rate 0.2 to 9400 Hz, Resolution 0.32 µm, Supply Voltage 15 to 24 VDC. More details for AR700-0250 can be seen below.