FSZMD, Flying Hours Counter, Digital
Winter flying hours counters are installed wherever actual flying time has to be recorded, primarily a consideration in training and charter aircraft, although this instrument should also be installed in aircraft operated by clubs or by private individuals, where it permits a check of inspection intervals to be kept. 

The flying hours counter has an digital display which displays in hours. It is connected to the aircraft’s total pressure sensor (pitot) and automatically switches on when airspeed increases to 60 km/h. This ensures that actual flying time only is recorded, while secondary times for take off and landing are ignored. 

Once installed, the plug can be sealed to prevent tampering.

Fits in a 57 mm (2 1/4") instrument hole.  See drawing at right for dimensions.
T tubing connector included
Power Input Required: 12 to 24 VDC, 2 to 4 mA

Dimensions

6 week lead time