Runleader digital hour meter RL-HM038AD — LCD panel-mount, 5–277V AC/DC, IP68 waterproof hour counter with two session timers

The Runleader RL-HM038AD is a durable digital hour meter with an LCD that tracks total machine run time up to 99,999 hours and works across a wide AC/DC voltage range.

This compact, panel-mount hour counter is built for engines, generators, lawn tractors, construction equipment and other powered devices where reliable service-hour tracking matters. Encapsulated in epoxy for waterproofing to IP68 standards and powered by an external supply (5–277V AC/DC), the RL-HM038AD records cumulative hours, supports two resettable session timers, and includes a built-in memory battery so recorded data persists when external power is removed.

How does the RL-HM038AD measure and store operating hours?

The meter increments total run time when the connected equipment receives power; for some machines, a pressure or seat switch will trigger recording. It stores the full-hour total up to 99,999 hours and keeps temporary session timers for short-term tracking.

• Total hours display: 0–99,999 hours.
• Two resettable session timers for single working periods.
• Built-in CR2050 backup battery retains data when external power is off.
• Starts counting when machine power or trigger switch is active.

What power sources and voltages does this hour meter accept?

The RL-HM038AD accepts a very wide external voltage window, compatible with most common vehicle and equipment power systems. It supports both AC and DC inputs without the need to observe polarity on its two connection pins.

• Operates on 5–277V AC or DC.
• Common supported voltages: 12V, 24V, 36V, 48V, 72V, 90V, 110V, 120V, 220V, 230V.
• Two-pin connection for simplified installation—no positive/negative distinction.
• Works directly with many alternators, batteries and power supplies.

Is the unit suited for outdoor or wet environments?

Yes—this hour meter is epoxy-encapsulated to protect internal electronics from moisture and dust. It meets IP68-level protection, allowing it to function even after immersion, which makes it a strong choice for marine, agricultural and outdoor power equipment.

• 100% epoxy resin encapsulation for moisture protection.
• IP68-rated for submersion resistance up to specified depths.
• Reliable operation when installed in exposed locations.
• Built to endure harsh, humid or dirty working environments.

How do you install and read the Runleader hour meter?

The meter is a simple panel mount designed to snap into a drilled cutout and requires only two electrical connections. An easy-to-read LCD shows accumulated hours and session timers for quick service planning and maintenance checks.

• Panel cut-out size: 37.50mm × 24.50mm (1.48" × 0.96").
• Drill-in and snap-in mounting—compact and low-profile bezel.
• Only two connection pins—quick hook-up to external power.
• Clear LCD readout for immediate hour and session information.

Who is this for: The Runleader RL-HM038AD is designed for technicians, fleet managers, farmers and hobbyists who need dependable, long-term run-time tracking on engines and powered equipment. It fits vehicles and stationary machines across industries—ideal when weather resistance, wide voltage compatibility and simple installation are priorities for maintenance scheduling and equipment lifecycle monitoring.