This device has been designed to be used up to 4kHz frequency. With this device you can measure rotational speed magnetically. The FDR unit has two built-in frequency measurement channels (RPM1, RPM2), where this unit can be connected.

Fix the unit firmly to the engine from the mounting holes using bracets. Connect the sensor to any of the free auxillary RPM channels (RPM 1,2) in the FDR. Glue the magnet supplied firmly to the spinner nut with epoxy glue, as described in following picture. For reliable operation the maximum distance from the magnet to the sensor should be 100mm.