3 In 1 Digital Gauge Water Temperature Bar Oil Pressure Gauge With Alarm Voltmeter | Red LED Display for Car Boat Truck

Keep an eye on your engine's most important readings with this 3 in 1 digital gauge. It combines water temperature, oil pressure, and voltage monitoring in one 52mm unit. The bright red LED display makes it easy to read at a glance, even in direct sunlight or low light conditions. Built-in alarms alert you when readings go outside safe operating ranges, helping you catch potential problems before they cause serious damage.

This gauge is designed for a wide range of 12V and 24V vehicles, including cars, boats, trucks, and off-road vehicles. It works with an operating voltage range of 8V to 32V, giving you flexibility across different electrical systems. The 316 stainless steel construction and IP67 waterproof rating mean it can handle tough environments, from engine bays to marine dashboards, without failing due to moisture or vibration.

The gauge comes with a water temperature sensor that supports multiple thread sizes, including 1/8NPT, 3/8NPT, M14X1.5, and M16X1.5. The oil pressure sensor uses a 1/8NPT thread. The built-in MCU provides stable performance and can match many types of sensor signals, including analog signals. If a sensor disconnects, the display shows "OFF" so you know immediately that something is wrong.

Alarms are pre-set for critical conditions. The water temperature alarm triggers above 95 degrees Celsius. The oil pressure alarm triggers below 0.8 bar. For 12V systems, the voltage alarm triggers below 11.5V. For 24V systems, the voltage alarm triggers below 22V. These alarms help you stay informed without constantly watching the display.

Key Features and Benefits

- 3 in 1 design that combines water temperature, oil pressure, and voltage monitoring into one gauge, saving dashboard space and simplifying installation

• High brightness red LED display that provides clear visibility in bright sunlight and low light conditions, so you can read data at a glance

• Built-in alarm system that alerts you when water temperature exceeds 95 degrees Celsius, oil pressure drops below 0.8 bar, or voltage falls outside safe range, helping you prevent engine damage

• IP67 waterproof and dustproof rating that protects the gauge from moisture, spray, and dust in engine bays and marine environments

• 316 stainless steel construction that resists corrosion from acid, base, and humidity, ensuring long-term reliability

• Imported MCU with stable performance that supports multiple sensor signal types, including 0-190 ohm, 240-33 ohm, 0-5V, 0.5-4.5V, and 4-20mA analog signals

• Sensor disconnect alarm function that displays "OFF" when a sensor is disconnected, so you know immediately if there is a wiring issue

• Compatible with 12V and 24V systems with an operating voltage range of 8V to 32V, making it suitable for cars, trucks, boats, and off-road vehicles

Who Is This For

- Car enthusiasts who want to monitor engine health with a single, easy-to-read gauge instead of multiple separate units

• Boat owners who need a waterproof, corrosion-resistant gauge that can handle the humid and salty conditions of marine environments

• Truck and van drivers who rely on 24V electrical systems and need a gauge that works across both 12V and 24V setups

• DIY mechanics and custom builders who want a versatile gauge that supports multiple sensor thread sizes and signal types for different engine configurations

Usage Scenario

Mark was driving his classic pickup on a long highway trip when he noticed the oil pressure reading on his new gauge dropping below normal. The red LED display caught his eye immediately. He pulled over, checked the oil level, and found a slow leak. Because the gauge gave him an early warning, he was able to add oil and tighten the drain plug before the engine suffered any damage. He says the alarm system alone is worth the upgrade.

Micro Comparison

Unlike basic single-function gauges that only show one reading, this 3 in 1 unit gives you water temperature, oil pressure, and voltage all in one compact 52mm housing. Many standalone gauges lack built-in alarms, forcing you to watch the needle constantly. This gauge has pre-set alarms that alert you automatically when readings go out of range. The IP67 waterproof rating and 316 stainless steel construction also make it more durable than standard plastic-housed gauges that can fail in wet or corrosive environments.

Specifications

Gauge Diameter: 52mm / 2.0 in

Item Weight: 150g / 5.3 oz

Material: 316 stainless steel and plastic

Operating Voltage: 8V to 32V DC (compatible with 12V and 24V systems)

Operating Current: 60mA or less

Operating Temperature: -20 to 70 degrees Celsius

Storage Temperature: -30 to 80 degrees Celsius

Water Temperature Range: 0 to 120 degrees Celsius

Water Temperature Alarm: Triggers above 95 degrees Celsius

Oil Pressure Range: 0 to 10 Bar

Oil Pressure Alarm: Triggers below 0.8 Bar

Voltage Alarm (12V system): Triggers below 11.5V

Voltage Alarm (24V system): Triggers below 22V

Water Temperature Sensor Threads: 1/8NPT, 3/8NPT, M14X1.5, M16X1.5

Oil Pressure Sensor Thread: 1/8NPT

Waterproof Rating: IP67

Package Includes

- 1 x Gauge

• 1 x Sensor

• 1 x Manual

• 1 x Cable

Why You Will Love It

You get three critical engine readings in one compact gauge, which simplifies your dashboard and reduces wiring work. The bright red LED display is easy to read, and the built-in alarms give you peace of mind knowing you will be alerted if something goes wrong. The durable stainless steel and waterproof design means this gauge will last through years of use in cars, trucks, or boats.

Questions and Answers

Question: Can this gauge be used on a 24V truck system?

Answer: Yes, it works with both 12V and 24V systems. The operating voltage range is 8V to 32V, so it is suitable for trucks, vans, and other vehicles with 24V electrical systems.

Question: What thread sizes does the water temperature sensor support?

Answer: The water temperature sensor supports 1/8NPT, 3/8NPT, M14X1.5, and M16X1.5 threads. You can choose the one that fits your engine.

Question: Does the gauge come with an alarm?

Answer: Yes, it has built-in alarms. The water temperature alarm triggers above 95 degrees Celsius. The oil pressure alarm triggers below 0.8 bar. The voltage alarm triggers below 11.5V for 12V systems and below 22V for 24V systems.

Question: Is the gauge waterproof?

Answer: Yes, it has an IP67 waterproof and dustproof rating. It can handle moisture, spray, and dust, making it suitable for engine bays and marine environments.

Question: What happens if a sensor gets disconnected?

Answer: The gauge has a sensor disconnect alarm function. If a sensor is disconnected, the display will show "OFF" so you know immediately that there is a wiring issue.