Round RPM Hour Meter, LCD Backlight

Supports real-time RPM display and maximum RPM recording. The ATO RPM hour meter is compatible with 4-stroke modes, suitable for most gasoline engines to achieve precise speed measurement. High-quality PCB and fully automated SMT assembly ensure stable and durable performance. LCD backlighting and IP65 protection rating adapt to various environmental conditions. Supports both AC/DC external power supply options for simple and reliable operation.

Specification

Features

1. Real-time RPM Display: During engine operation, the LCD shows current RPM and records peak RPM for easy monitoring of running conditions.
2. Low-Power Design: Built-in long-lasting battery with external power connection capability ensures stable long-term operation, with a lifespan up to 20 years.
3. Precision and Reliability: High-quality electronic components and fully automated SMT assembly, coupled with optimized circuit design, enhance durability and operational stability.
4. Automatic Data Storage: Utilizes high-quality CMOS EEPROM memory to automatically save timing data and user settings, ensuring data accuracy and integrity.
5. Wide Compatibility: Suitable for most gasoline engines, supporting adjustment across 4 ignition modes.

Timing Function

• Timing Operation Mode: When gasoline engine ignition signal is detected, the upper display zone flashes TOT and shows the current total timing.
• Timing Categories: Total timing and single timing.
• Total Timing Range: 0-99999.9 hours, non-resettable.
• Single Timing Range: 0-9999.9 hours, resettable.

Tachometer Function

• When detecting gasoline engine ignition signals, displays current RPM in the lower display zone.
• 4 stroke cycle options: 1P1R, 2P1R, 1P2R, 3P1R.
• Maximum RPM measurement: 20000, 15000, 20000, 10000 RPM.
• Maximum RPM Recording: When the signal stops, the highest RPM is displayed in the lower half of the display for 13 seconds.

Dimension (Unit: mm)

Installation

Note: The mounting plate requires corresponding mounting holes. If none are present, drill holes at the appropriate locations on the mounting plate.

1. Place the product into the mounting slot.

2. Secure the timer with two screws.

3. Refer to the image below: wrap the sensor wire around the engine spark plug at least 5 times and secure it with a zip tie.

Note: Improper wrapping of the sensor wire may affect the accuracy of test data.

Applications

Designed for gasoline engines, this RPM hour meter is compatible with most models on the market, delivering precise RPM monitoring and runtime tracking.

Tips: Working Principle of an Hour Meter for Gasoline Engine

rpm hour meter for gasoline engine operates by detecting the ignition signal generated when the engine is running. Each ignition pulse is converted into an electrical signal, allowing the meter to determine whether the engine is operating. When the ignition signal is present, the hour meter begins accumulating operating time and, in RPM-enabled models, calculates engine speed based on pulse frequency. The accumulated operating time is continuously recorded and stored in internal memory, ensuring accurate long-term tracking even during power interruptions. This working principle allows hour meters to provide reliable data for maintenance scheduling, service intervals, and overall engine lifespan management.