Datcon Hour Meter #871 12/24V

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Part# 56456-3
MFR Model# 100689


3-hole flange, mounting 2.54" bolt, Circle 1.45" diameter holes.

Standard equipment in most production aircraft. Operate on any DC voltage from 12 to 24 volts. These solid-state hour meters are recommended for use on aircraft because they start or stop instantly when power is applied or removed. Furnished with mounting hardware. If meter is connected improperly it will not operate but meter will not be damaged. The running indicator indexes every 6 seconds.

California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


  • “Inhibited” hourmeters accumulate hours only when the engine is running and a signal is being applied to the unit.
  • “Uninhibited” hourmeters accumulate hours whenever power is applied to them.



Please note, Pilotshop's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Pilotshop assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is it possible to preload hours to match our existing hobbs meter that stopped functioning?

No, we cannot pre-set the hours on this meter.