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

Monitor your diesel engine's RPM with precision using this 85mm digital tachometer. It combines a clear LCD hour meter with a red backlight for easy reading in low light conditions. The package includes both M16 and M18 sensors for versatile installation on cars, boats, and motorcycles.

This gauge uses a stepper motor driver for accurate readings and reliable performance. The bezel is made from SUS316 stainless steel with double-layer anti-fogging glass for durability. It works with a 12V or 24V electrical system and connects easily with the included patchcord.

The sensor is designed for gear rotation speed measurement. It provides a stable sine wave signal and operates in temperatures from -40 to 85℃. The sensor has a waterproof IP67 rating for use in demanding environments.

Installation is straightforward. Mount the gauge directly to the baseboard by hand. Connect the red wire to the positive pole, the blue wire to the negative pole, the black signal wire to the engine sensor, and the orange wire to the positive pole for the backlight.

Key Features and Benefits

- SUS316 stainless steel bezel that resists corrosion and provides a premium look

• Double-layer anti-fogging glass that keeps the display clear in changing temperatures

• Red backlight that improves visibility in dark engine compartments or at night

• Stepper motor driver that delivers high precision and reliable speed readings

• M16 and M18 sensor options that fit different engine types without extra adapters

• IP67 front and IP65 back protection that withstands water and dust exposure

Who Is This For

- Boat owners who need a reliable tachometer for their outboard or inboard diesel engine

• Car enthusiasts upgrading their dashboard with a digital RPM gauge and hour meter

• Motorcycle riders who want to monitor engine performance during long trips

• Mechanics and technicians who require accurate RPM data for engine diagnostics

Usage Scenario

Mark owns a fishing boat with a diesel outboard engine. He needed a way to track engine hours for maintenance and monitor RPM for fuel efficiency. After installing this tachometer, he can see both readings clearly on the same display. The red backlight helps him check the gauge even when running the boat at dusk. The IP67 rating gives him confidence that the unit will hold up to spray and weather.

Micro Comparison

Many tachometers only offer one sensor size or lack an hour meter. This unit includes both M16 and M18 sensors and combines RPM and hour tracking in a single gauge. The stepper motor driver provides more accurate readings than older analog designs.

Specifications

- Material: Stainless Steel, Glass, Plastic

• Bezel Material: SUS316

• Installation Dimension: 85 mm / 3.38 in

• Indicating Range: 0 to 3000 RPM

• Working Voltage: 12V / 24V (9 to 32V)

• Backlight: Red

• Protection Grade: IP67 front, IP65 back

• Gauge Size: 10.5 x 10.5 x 9.5 cm

• Sensor Signal: Sine Wave

• Sensor Operating Temperature: -40 to 85℃

• Sensor Protection: IP67

• Sensor Size Options: M16, M18

• Number Of Cylinders: 3

Please allow 1-3 cm / 0.4-1.2 in difference due to manual measurement.

Package Includes

- 1 x 85mm Tachometer Gauge

• 1 x M16 RPM Sensor

• 1 x M18 RPM Sensor

• 1 x Wiring Harness

Why You Will Love It

You get a complete RPM monitoring solution with both sensors included. The dual display of RPM and engine hours helps you stay on top of maintenance schedules. The rugged stainless steel build and waterproof rating mean it will last through years of use on the water or on the road.

Questions and Answers

Question: Does this tachometer work with a 12 volt system?

Answer: Yes, it works with both 12V and 24V systems (9 to 32V range).

Question: Can I use this on a gasoline engine?

Answer: Yes, it works on both diesel and gasoline engines.

Question: What is the sensor mounting thread size?

Answer: The package includes sensors with both M16 and M18 thread sizes.

Question: Is the gauge fully waterproof?

Answer: The front is rated IP67 and the back is rated IP65, so it is highly water resistant.

Question: Does the hour meter reset automatically?

Answer: The hour meter records total engine run time and does not reset.