Linear measurement sensors from SICK use highly innovative technologies for the non-contact measurement of positions, speeds, and lengths. The OLM sensors' camera-based system determines the current position based on a mounted bar code tape. This acts as a reference point against which the OLM sensor can position itself accurately, depending on variants, over a length of up to 10 km and as little as 0.15 mm, regardless of whether the product travel path is in a straight line or curved.Click here for more information: https://www.sick.com/OLM