52 mm Mechanical Hour Meter, 12-36 V Hour Counter
Logging engine hours by hand stops as soon as you get busy. This 52 mm round mechanical hour meter counts running time on 12-36 V systems, so servicing can follow hours instead of guesswork. It suits cars, boats, generators and diesel or petrol engines.
Service intervals that follow the dial
✅ Hours, not guesswork The counter runs while the engine is powered, so servicing lands on the hour, not a guessed date.
✅ Three voltages One gauge covers 12, 24 and 36 V systems, so a car, lorry or boat install uses the same part.
✅ Stated for heat The stated range runs from 38 to 120 °C, which covers the warm side of an engine bay.
✅ Answers the mechanic When a workshop asks for the hour count, the dial answers instead of a search through old invoices.
The meter adds hours whenever its 12-36 V feed is live, so the circuit it taps decides what gets counted. Take the feed from something that only runs with the engine, otherwise the counter will keep adding time with the key on and the engine off.
The face is 52 mm across and the body is round, which is the size most dash and panel instruments use. One version is sold, so there is no bezel, connector or colour choice to make before ordering.
It shows accumulated hours and nothing more: no reset button and no service alarm are stated, so the figure is there to read and note down. Engines that sit for months still age, and the dial will show only the hours they actually turned.
The stated temperature range of 38 to 120 °C covers a hot engine bay, but the meter is a panel instrument and not a sealed one, so keep it out of direct spray and standing water.
Technical details
- Type: round mechanical hour meter and hour counter
- Voltage: 12-36 V
- Face size: 52 mm
- Temperature range stated: 38-120 °C / 100-250 °F
- Applications: car, boat, generator, diesel and petrol engines
- Reset or service alarm: none stated
- Variants: single version
- Pack contents: hour meter; wiring and fixings not stated
Check the voltage of your circuit, then fit the meter and let the dial keep the hours.
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