The Length Measuring Device consist of a frame, which supports the case hardened guides for the lift of the upper track, which is composed of two timing pulleys.
A pneumatic actuator lifts the upper track with manual valve through a pressure regulator.
The two pulleys on the upper track are connected with a timing belt.

The two lower track pulleys are assembled on a trolley and connected by a timing belt. The pulley is coupled with an encoder which measure the revolutions and transmits them to the electronic device which converts the into meters. All of the components are assembled on a pedestal with four anti-vibration fixing feet.