HTPREC Digital Tachometer & Hour Meter — Compact Waterproof RPM Gauge, Clip-On Pickup, Up to 36,000 RPM

Whether you tune a lawn mower, maintain an outboard motor, or check a dirt bike, this pocket-sized HTPREC tachometer provides RPM readings up to 36,000 (in high-sensitivity mode), runtime tracking, and alarm/backlight options in a weather-resistant housing. It uses a clip-on signal pickup for safe, non-invasive installation and runs on a user-replaceable battery for long-term field use.

How does the HTPREC tachometer measure engine speed?

The device senses ignition pulses via an included clip-on pickup that attaches to the spark plug wire. It converts those pulses into live RPM readings with selectable modes for sensitivity and cylinder count.

• Pulse pickup clips to spark plug or ignition wire—no internal wiring needed.
• RPM display modes: standard up to 18,000 RPM and high-sensitivity up to 36,000 RPM.
• Compatible with 1–8 cylinder gasoline engines, both 2- and 4-stroke.
• Instant MAX RPM capture and configurable RPM alarm threshold.

What maintenance and logging features are included?

Beyond momentary RPM, the HTPREC records total run time and job-specific hours so you can schedule service and track individual tasks. Memory stores settings and counters to avoid losing data between uses.

• TOT and JOB hour meters for lifetime and task-based tracking.
• Dedicated service reminder and resettable job timer.
• Max RPM recall to check peak engine speed after use.
• Battery and memory retention keep data between sessions.

Can I use it in low light or damp conditions?

The tachometer has a waterproof-rated enclosure and selectable backlight modes so you can read data in dim environments or at night. A warning backlight option highlights over-rev situations.

• Default green backlight with always-on, auto, or off settings.
• Red warning backlight activates when RPM or configured limits are exceeded.
• Rugged, weather-resistant housing suitable for outdoor tools and marine engines.
• Auto-sleep and auto-start conserve battery when the engine is off.

How easy is installation and battery replacement?

Installation is plug-and-play: clamp the signal pickup to the spark plug wire, set the engine type and cylinder count, and you're measuring. The unit runs on a replaceable battery so you can keep it serviceable without special tools.

• Signal pickup clip provides secure, non-invasive connection to ignition wire.
• Quick battery access for standard replacement—no soldering required.
• Auto power-off when engine stops to extend battery life.
• Simple buttons and memory functions make field adjustments fast.

Who is this for? The HTPREC digital tachometer suits owners, mechanics, and operators of small-gasoline engines who need accurate RPM feedback and runtime logging: lawn care technicians, boaters, ATV and dirt bike riders, chainsaw and generator users, and hobbyists who tune or monitor engines. It’s built for people who want a lightweight, portable gauge that installs without modifying the engine and keeps a record of operating hours for timely maintenance planning.