85mm Diesel Engine Tachometer 0-4000RPM | Digital LCD Hour Meter with M16/M18 RPM Sensor

Key Features

• Stepper Motor Driver — The stepper motor driver delivers high precision and reliable speed readings.
• Anti-Fogging Glass — The double-layer anti-fogging glass keeps the display clear as temperatures change.
• Red Backlight — The red backlight makes the display easier to read in dark engine compartments or at night.
• M16 and M18 Sensors — Both sensor sizes are included, so the gauge fits different engine types without extra adapters.
• IP67 Front Protection — The front is rated IP67 and the back IP65, built to withstand water and dust exposure.

Product Specifications

• Material: SUS316 stainless steel bezel
• Dimensions: 85mm (3.35 in)
• Product size: 10.5 × 10.5 × 9.5 cm (4.1 × 4.1 × 3.74 in)
• Indicating range: 0 to 3000 RPM
• Working voltage: 12V / 24V (9 to 32V)
• Sensor operating temperature: -40 to 85℃
• Sensor signal: Sine Wave
• Protection grade: IP67 front, IP65 back
• Backlight: Red
• Part number: 0-4000RPM

What It Is / How It Works

This 85mm digital tachometer is a diesel engine gauge that shows engine RPM and an hour meter on one clear LCD display. It works on both diesel and gasoline engines. The hour meter records total engine run time and does not reset. Digital engine tachometers of this type are usually mounted on a dashboard or panel where the reading can be checked while the engine runs.

Who It's For / Use Cases

It suits boat owners with an outboard or inboard diesel engine, car enthusiasts adding a digital RPM gauge to a dashboard, motorcycle riders who want to monitor engine speed on long trips, and mechanics who need accurate RPM readings for engine diagnostics.

How to Use / Care

1. Connect the gauge to a 12V or 24V electrical system (9 to 32V).
2. Read engine RPM and engine hours on the same display.
3. Use the red backlight to read the gauge in dark engine compartments or at night.
4. Choose the M16 or M18 sensor that matches your engine's thread size.

How to Choose

Start with the sensor thread: the package includes both M16 and M18 sensors, so pick the one that matches your engine. Confirm the system voltage falls within the 9 to 32V working range, which covers both 12V and 24V systems. If the gauge will be exposed to spray or weather, the IP67 front and IP65 back rating is the feature to compare against your location.

Frequently Asked Questions

Does this tachometer work with a 12 volt system?
Yes, it works with both 12V and 24V systems (9 to 32V range).

Can I use this on a gasoline engine?
It works on both diesel and gasoline engines.

What sensor thread sizes are included?
The package includes sensors with both M16 and M18 thread sizes.

Is the gauge waterproof?
The front is rated IP67 and the back is rated IP65, so it is highly water resistant.

Does the hour meter reset automatically?
The hour meter records total engine run time and does not reset.