The MPR-2000 is a readout device specifically designed to measure manually relative movements of normal and inverted pendulums.
 
The readout is placed onto a mounting bracket in a suitable location and measurements are taken by aligning the sight, the wire and the wire reflection and noting the position on the Vernier scale. Changes in this position can then be related to movement of the pendulum.
 
Manufactured from high grade stainless steel it is robust and maintenance-free.