85mm Tachometer Gauge with Digital Hourmeter RPM Sensor | Universal for Car Boat

Monitor your engine's performance with this 85mm tachometer gauge that includes a digital hourmeter and RPM sensor. It is designed for universal use in cars, boats, trucks, and diesel or gasoline engines, giving you accurate readings to keep your vehicle running smoothly.

This tachometer combines a clear gauge display with a reliable sensor for measuring gear rotation speed. The gauge features a red backlight and a racing-inspired look that enhances your dashboard. It works with a variety of input signals including tacho sensors, engines, alternators, ignition coils, and crankshaft sensors, making it a versatile choice for many setups.

The sensor is built for durability with a waterproof IP67 rating, allowing it to function even in challenging conditions. It outputs a stable sine wave signal and operates over a wide temperature range from -40 to 85°C. The adjustable speed ratio from 1 to 300 lets you fine-tune the reading for your specific engine or vehicle.

Installation is straightforward with the included manual. The gauge connects with a simple wiring scheme: red to battery positive, blue to battery negative, black for signal, and orange for backlight. It supports both 12V and 24V systems, making it suitable for a wide range of vehicles and equipment.

Key Features and Benefits

- 85mm gauge diameter that provides a large, easy-to-read display for quick RPM checks

• Digital hourmeter included to track engine run time for maintenance scheduling

• Waterproof IP67 sensor that works reliably in wet or dusty environments

• Adjustable speed ratio from 1 to 300 to match different engine types and signal sources

• Racing-inspired design with red backlight that adds a sporty look to your dashboard

Who Is This For

- Car owners who want to add or replace a tachometer for better engine monitoring

• Boat operators needing a waterproof gauge that can handle marine conditions

• Truck drivers or diesel generator users looking for a universal RPM meter

• DIY mechanics and enthusiasts installing a gauge on gasoline or diesel engines

Usage Scenario

Mark noticed his boat engine was running rough but couldn't tell exactly what was happening. He installed this tachometer with the included sensor, connecting it to the ignition coil. The clear display showed the RPM dropping at idle, helping him identify a fuel issue before it caused serious damage. Now he checks the hourmeter after every trip to schedule oil changes on time.

Micro Comparison

Unlike basic tachometers that only show RPM, this gauge also includes a digital hourmeter to track engine runtime. The included sensor is waterproof with an IP67 rating, so it works in marine and outdoor applications where standard sensors might fail. The adjustable speed ratio gives you flexibility to match different engine types without needing extra adapters.

Specifications

Gauge Diameter: 85mm / 3.3 in

Material: Stainless steel and nickel-plated plastic shell

Operating Voltage: 12V / 24V

Indicating Range: 0-3000 RPM

Input Signal: Pulse signal from tacho sensor, engine, alternator, ignition coil, crankshaft sensor, etc.

Adjustable Speed Ratio: 1-300

Protection Class: IP67 (waterproof up to 1m depth)

Sensor Output Signal: Sine wave

Sensor Signal Duty Factor: 47±5%

Sensor Operating Temperature: -40 to 85°C / -40 to 185°F

Sensor Inductance Distance: Less than 1mm / 0.04 in

Sensor Tooth Module: 2-6

Wiring: Red-Battery(+) 9-32VDC, Blue-Battery(-), Black-Signal, Orange-Backlight(+) 9-32VDC

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

Package Includes

- 1x Tachometer

• 1x Installation Instruction

• 1x Sensor

Why You Will Love It

You get a complete monitoring solution in one package — gauge, sensor, and instructions — so you can install it right away. The waterproof design means you can trust it on the water or in tough weather. And the sporty red backlight gives your dash a custom look while keeping RPM data clear at a glance.

Questions and Answers

Question: Can this tachometer work on a 12V car?

Answer: Yes, it works on both 12V and 24V systems, so it is suitable for most cars, trucks, and boats.

Question: Is the sensor included in the package?

Answer: Yes, the package includes one sensor along with the tachometer gauge and installation instructions.

Question: What kind of engines does this gauge fit?

Answer: It fits car, truck, boat, diesel generator, and gasoline engines. It accepts pulse signals from various sources like the ignition coil and crankshaft sensor.

Question: Is the gauge waterproof?

Answer: The gauge itself is not fully waterproof, but the sensor has an IP67 rating and can work underwater at depths up to 1 meter.

Question: How do I connect the wires?

Answer: Connect red to battery positive (9-32VDC), blue to battery negative, black to signal, and orange to backlight positive (9-32VDC). The manual provides detailed wiring instructions.