Runleader Digital Hour Meter RL-HM057AD — LCD Display, Wide 5–277V Input, IP68

The Runleader RL-HM057AD is a compact digital hour counter with an LCD display that accurately records equipment runtime from 0 to 99,999 hours and supports wide input voltages.

The RL-HM057AD hour meter combines a clear numeric LCD, wide-voltage compatibility and robust sealing so you can track operating hours on engines, generators, mowers and other powered equipment. Built with epoxy encapsulation and an internal backup battery, it keeps a reliable runtime log across harsh environments and varied power systems.

How does this hour counter measure and store runtime?

The meter starts counting when it detects external power and records cumulative hours up to 99,999. A built-in CR2050 battery maintains the display memory so the total is preserved when external power is removed.

• Counts total operating hours continuously from 0 to 99,999.
• Starts logging when the device receives AC or DC voltage.
• On machines with seat-pressure switches (e.g., riding mowers), it begins when the switch is engaged.
• Internal CR2050 battery preserves data during power interruptions.

What power sources and voltages does the RL-HM057AD accept?

This hour meter accepts a broad range of input voltages, allowing it to work with many vehicle and equipment electrical systems. It supports both AC and DC supplies, so a single unit fits multiple applications without extra converters.

• Operates across 5V to 277V AC/DC input range.
• Compatible with common system voltages such as 12V, 24V, 48V, 110–230V and others.
• No polarity-sensitive terminals—two identical pins simplify wiring.

Is the meter durable enough for outdoor and wet environments?

The RL-HM057AD is epoxy-encapsulated and rated to withstand immersion, making it appropriate for wet or dusty locations. Its IP68-level protection ensures it remains operational even when exposed to rain, splashes or temporary submersion.

• Solid epoxy resin construction for strong water and dust resistance.
• IP68-rated performance; functions properly after immersion testing up to 10 meters.
• Sealed display and body to resist workshop and outdoor conditions.

How easy is installation and what mounting options are there?

Install the hour meter into switch panels or equipment housings with a simple drill-and-snap method using the specified cut-out size. The meter's two identical pins make electrical connection straightforward, and its compact footprint fits tight control panels.

• Panel cut-out size: 37.50mm × 24.50mm (1.48" × 0.96").
• Snap-in mounting after drilling the panel opening; no special brackets required.
• Two-pin connection; positive and negative are not differentiated for easier wiring.

Who this is for: The Runleader RL-HM057AD is suited for equipment owners, maintenance technicians and fleet managers who need a dependable, compact hour meter for tractors, lawn mowers, generators, compressors, construction machines and other powered assets. Choose it when you want wide-voltage compatibility, IP68-level protection and an easy panel mount solution to track service intervals and equipment usage.