Harsh industrial environments place high demands on optical displacement sensors – precise measurements must still take place despite dust and high processing speeds. The optoNCDT 1700 and optoNCDT 2300 series of laser sensors have been mastering these challenges for many years. However, if motion disturbances (e.g. belt movements, radial movements of pulleys, and base body vibrations) occur that are greater than the object being measured, the measurement process may be impeded or made impossible. Examples include folds in a belt.