MGL is able to offer the popular GT1 gear tooth sensor at a good price direct from the manufacturer.
The GT1 sensor is typically used to measure rotor speed RPM at the pre-rotation gear of a Autogyro aircraft. It is however equally at home in other applications where RPM can be obtained from gear teeth sensing.

The GT1 is primarily used with the Ultra RL, RV-1 and RV-2 units but can also be used with all other of MGL instruments for RPM measurement.