User-Selectable Warning Threshold

The two faceplate buttons allow the driver to configure a temperature-warning threshold.

When coolant temperature reaches the selected limit, the gauge provides a visual warning so the driver can reduce load or stop the engine before conditions become more severe.

The appropriate warning setting depends on:

• Normal engine operating temperature
• Thermostat rating
• Cooling-system pressure
• Vehicle use
• Manufacturer specifications

A programmable warning is useful, but it cannot guarantee protection against engine damage. It supplies information; the driver still has to respond instead of negotiating with the temperature reading.

Peak-Temperature Recall

The peak-recall function stores the highest temperature recorded during operation.

This is useful for reviewing coolant temperature after:

• Towing
• Steep climbs
• Track sessions
• Off-road driving
• Extended idling
• Stop-and-go traffic
• Hot-weather operation

Peak recall allows you to identify a brief temperature spike without continuously watching the gauge while driving.

Fahrenheit or Celsius Display

Use the faceplate controls to select either standard or metric temperature readings.

This makes the gauge easier to use with vehicle specifications, service manuals and tuning information written in either Fahrenheit or Celsius.

Slim 52mm Housing

The gauge fits a standard 2-1/16-inch, or 52mm, mounting opening.

Its listed depth is less than approximately 18.8mm, allowing installation in locations where conventional gauges may not have enough rear clearance.

Potential mounting locations include:

• A-pillar gauge pods
• Dashboard pods
• In-dash openings
• Under-dash panels
• Custom instrument clusters

Verify the complete dimensions of the physical gauge before cutting a mounting opening.

12V and 24V DC Compatibility

The supplied specifications list compatibility with 12V and 24V DC electrical systems and a maximum current draw of approximately 0.3 amps.

Potential applications include compatible:

• Passenger cars
• Pickup trucks
• Heavy-duty trucks
• RVs
• Off-road vehicles
• Boats and marine vehicles
• Custom equipment

Confirm operating voltage in the included instructions before connecting power, particularly on a 24V system.

Included 1/8-Inch NPT Sender

The kit includes an electronic temperature sender with a 1/8-inch NPT mounting thread.

Possible installation locations include:

• Cylinder-head coolant passage
• Intake-manifold coolant port
• Thermostat housing
• Engine block
• Coolant outlet
• Inline radiator-hose adapter

Not every engine provides a compatible 1/8-inch NPT port. A vehicle-specific thread adapter or radiator-hose adapter may be required.

Product Specifications

• Gauge type: Digital water-temperature gauge
• Display: Center digital LED readout
• Perimeter indicator: Sweeping blue LED
• Gauge diameter: 2-1/16 inches / 52mm
• Temperature range: 100–300°F
• Metric range: Approximately 38–150°C
• Display units: Selectable Fahrenheit or Celsius
• Warning function: User-selectable temperature threshold
• Peak recall: Yes
• Faceplate controls: Two buttons
• Power supply: Listed for 12V/24V DC
• Maximum current draw: Approximately 0.3A
• Sender thread: 1/8-inch NPT
• Listed gauge depth: Less than approximately 18.8mm
• Installation type: Universal

The matching current listings identify the gauge as manufacturer part number WTM-Y-CB-02-BL. Several pieces of the supplied marketing language closely resemble AEM X-Series copy, so this product should not be described or branded as an AEM gauge.

What’s Included

• One 52mm digital water-temperature gauge
• One 1/8-inch NPT temperature sender
• Sensor wiring
• Power wiring
• Mounting components
• Installation instructions

Exact package contents should be checked against your inventory before publication.

Why Add an Aftermarket Temperature Gauge?

Many factory coolant gauges show only a generalized cold-to-hot reading. Some remain near the middle of the scale across a wide temperature range, then suddenly move toward hot after a problem has already developed.

This digital gauge can help you:

• Monitor actual coolant-temperature numbers
• Set a personalized warning threshold
• Review peak temperature after driving
• Detect intermittent overheating
• Confirm cooling-fan operation
• Evaluate cooling-system upgrades
• Monitor an engine swap
• Track temperature during towing or performance use

If high temperatures appear with coolant loss, corrosion or visible leakage, review our guide to the seven signs of a failing radiator.

Installation Notes

Install the included sender where it remains in direct contact with circulating engine coolant.

Before installation:

• Allow the engine to cool completely.
• Disconnect battery power.
• Verify the available sender-port thread.
• Use a suitable thread adapter when required.
• Confirm the gauge’s operating-voltage setting.
• Install appropriate fuse protection.
• Use switched DC power.
• Provide a clean electrical ground.
• Route wiring through a protected firewall grommet.
• Keep wiring away from exhaust components.
• Avoid belts, pulleys and cooling fans.
• Bleed trapped air from the cooling system.
• Inspect the sender connection for leaks.
• Configure and test the warning threshold.

Retain the factory coolant-temperature sensor whenever possible. The ECU may use it for fuel control, ignition timing, cooling-fan operation and warning lights.

For additional information, read our guide explaining how an engine coolant temperature sensor works.

Frequently Asked Questions

What is the correct measurement range?

The consistent specification is 100–300°F, which equals approximately 38–149°C. The −17–187°C range in the supplied title is mathematically incorrect.

Does the gauge display Fahrenheit and Celsius?

Yes. The faceplate buttons allow selection between standard and metric readings.

What does peak recall do?

Peak recall displays the highest temperature recorded during operation, helping identify temporary temperature spikes.

Can I program the overheating warning?

Yes. The gauge provides a user-selectable temperature-warning threshold.

Does the gauge use an analog needle?

No. It combines a numerical center display with a sweeping blue LED indicator around the gauge face.

Is the sender included?

Yes. A temperature sender with a 1/8-inch NPT thread is included.

Will the sender fit every vehicle?

No. Engines use several NPT and metric coolant-port sizes. An adapter may be required.

Does the gauge work on 24V vehicles?

The listing claims 12V and 24V DC compatibility. Confirm this in the included instructions before connecting it directly to a 24V system.

Is this an AEM X-Series gauge?

No. Some marketing language resembles descriptions of the AEM X-Series, but this product should not be represented as an AEM product unless your physical inventory and packaging confirm that branding.

Does the alarm shut down the engine?

No. The visual warning alerts the driver but does not automatically reduce power or shut down the engine.

What should I do if the warning activates?

Reduce engine load and watch whether the temperature stabilizes. If it continues rising, coolant escapes or steam appears, pull over safely and shut off the engine. Never open a hot cooling system.

Our guide on how to deal with an overheating engine explains what to check next.

Advanced Monitoring in a Compact Gauge

This universal 52mm gauge provides more functionality than a basic coolant-temperature display.

With selectable measurement units, peak recall, programmable warnings, a digital center readout and sweeping blue LED indicator, it provides a useful monitoring package for compatible automotive and marine applications.