Runleader Digital Maintenance Hour Meter RL-HM038AG-H — AC/DC 5V–277V, IP68 Epoxy-Potted

The Runleader RL-HM038AG-H is a tough, fully sealed digital hour meter that records machine run time across AC or DC 5V–277V systems and shows accumulated hours even when power is off.

This compact maintenance gauge helps you track total operating hours, set regular oil-change reminders, and preserve runtime records in challenging environments. Encapsulated in epoxy resin to IP68 standards and backed by EEPROM storage plus a CR2050 backup battery, it’s built for lawn mowers, generators, and other outdoor equipment that need reliable service tracking.

How does the RL-HM038AG-H record hours and reminders?

The meter counts only when the machine is running, using either supply voltage or a spark-plug pulse as its signal source. It displays the cumulative hours on an LCD that remains visible when the equipment is powered down, and can be set to prompt maintenance at set intervals.

• Records total run time from 0 to 99,999 hours
• Oil-change reminder configurable every 50 hours
• Operates from machine voltage or ignition pulse
• Display stays visible when unit is off

Is it durable enough for outdoor and wet conditions?

Yes — the RL-HM038AG-H is potted in epoxy resin to protect internal electronics from moisture and impact. It meets IP68-level water resistance and can withstand immersion up to 10 meters, making it suitable for wet, dusty, and vibration-prone environments.

• 100% epoxy potting for moisture protection
• IP68-rated: designed to run submerged up to 10 meters
• Resistant to dust and vibration typical of outdoor equipment

What machines and voltages is this hour meter compatible with?

The RL-HM038AG-H accepts a very wide voltage range, so it fits both low-voltage DC systems and common AC supplies. It’s commonly used on residential mowers, commercial turf equipment, and portable generators where simple, reliable hours tracking is required.

• Wide input range: AC/DC 5V to 277V
• Works with lawn mower models and typical portable generators
• Can start counting via seat/pressure switch or ignition signal
• Commonly compatible models include lawn tractors and GP/WH series generators

How is the RL-HM038AG-H installed and maintained?

Installation is straightforward: cut the panel opening, snap the unit into place, and connect to the machine’s power or ignition signal. Internal EEPROM preserves runtime history and a CR2050 backup battery keeps data and display memory when external power is interrupted.

• Panel cut-out required: 37.5mm x 24.5mm (1.48" x 0.96")
• Simple drill-in mount and snap-in retention
• Built-in CR2050 360mAh battery for display/data retention
• EEPROM stores accumulated hours securely

Who is this for? The Runleader RL-HM038AG-H fits owners and technicians who need a small, durable, low-maintenance hour counter for outdoor engines and equipment. It’s ideal for homeowners tracking mower service intervals, landscapers managing fleet maintenance, and anyone running portable generators or utility machines that require waterproof, long-term hour logging without complex wiring or regular battery replacement.