Runleader digital tachometer hour meter RL-HM035A-TS002 — RPM, job/total hours & temp probe, programmable alerts

The Runleader RL-HM035A-TS002 is a compact digital tachometer and hour meter that tracks engine RPM, total and job hours, and current/maximum temperature with programmable alerts and backlight modes.

Designed for small engines, generators, lawn equipment and industrial machines, this combined tach/hour/temperature gauge consolidates essential operating data into a single instrument. It records cumulative (TOT) and individual job (JOB) run hours, monitors real-time and peak RPM, and reads engine temperature via a probe. Programmable service reminders and high/low alerts help you plan maintenance without guesswork.

How does the meter measure and display engine running time?

The meter keeps two separate hour counters: a cumulative total (TOT) and a resettable job timer (JOB). You can also preset previous hours (INT) if installing a replacement unit so maintenance intervals remain accurate. A service (SVC) timer can be set between 5 and 1000 hours to trigger reminder alerts.

• TOT & JOB range: 0–99,999 hours for long-term tracking
• INT function allows transferring prior hours during replacement
• SVC alert configurable from 5 to 1000 hours

What RPM and alert features are available?

The gauge reads RPM in real time for a variety of engine firing patterns and shows the highest RPM reached since startup. You can configure an RPM alert between 100 and 25,000 RPM to warn when the engine exceeds safe or desired speed. This helps tune idle, catch over-revving and protect drivetrains.

• Real-time RPM display up to 25,000 RPM
• Peak RPM memory for each run session
• User-set alert channel for over-rev notification

How does the temperature monitoring work and what ranges are supported?

Temperature is monitored through a probe (do not bend the induction probe) that reports current and maximum readings. The gauge supports both Celsius and Fahrenheit and can alert if temperature exceeds your configured threshold. Measurement spans -20°C to 300°C (-4°F to 572°F), covering most small-engine applications.

• Temp range: -20°C ~ 300°C (-4°F ~ 572°F)
• Displays current and highest recorded temperature
• Switchable °C / °F and user-set exceed alerts

What are the installation, power and visibility features?

The unit is lightweight and versatile to mount using adhesive, screws or an optional bracket (bracket not included). It connects to the engine with a single pickup wire wound around a spark plug lead; recommended 5–8 tight wraps for reliable signal. The display uses a green backlight by default with optional automatic, always-on or off modes, and turns red when RPM or temperature exceed set limits.

• Single-wire spark plug pickup, 68.8-inch lead (can be shortened/extended)
• Green backlight with automatic/always/off options; red warning backlight
• Water and shock resistant housing with replaceable battery and insulation sheet for transport

Who is this for? The Runleader RL-HM035A-TS002 suits mechanics, fleet managers, small-farm operators and DIYers who need consolidated, accurate runtime, speed and temperature data from gasoline engines, generators, mowers and other equipment. It’s useful when you want a durable, easy-to-install instrument that helps schedule maintenance, monitor performance and catch potential issues before they lead to costly repairs.