http://www.usa.canon.com/cusa/semiconductor/products/encoder_optolectronic_components/laser_doppler_velocity_sensor/lv_series?pageKeyCode=writeReviewPage
LV Series
3333339
Features
-
Contact-free measuring of movement speeds, movement distances, speed irregularities, and rotation irregularities.
-
Enables wide speed range measurement from still state.
-
Automatic gain control (AGC), Automatic Doppler frequency following function are equipped.