The black mesh/gold film transducers on these sensors cannot be repaired if damaged due to dents or punctures:

To avoid such damage, we recommend protecting the Motion Detector when doing simple harmonic motion experiments where weights are suspended over the sensor. A simple wire in-basket can be placed over the Motion Detector to protect the sensor without introducing interference.

The transducer on the Go Direct Motion Detector can be replaced in the event of damage. However, this sort of damage is not covered under warranty and there will be a repair fee.
Contact or call 888-837-6437.

Other tips for good results:

  • Tape the mass to the spring so that it does not fall off.
  • Do not pull the mass to the bottom of the cycle, then release it up. Instead, start the oscillation by releasing the mass downward from near the top of the cycle.