Description
Product Overview
The Longacre Waterproof LED Panel Gauge is engineered for precise water and oil temperature monitoring in automotive applications. Measuring 2.5 inches in diameter, the gauge features a painted exterior that resists corrosion and a fully sealed design that eliminates the need to remove it during car washes. LED digital numbers provide crystal‑clear readouts, while an integrated dimmable function lets you adjust brightness for daytime racing or nighttime driving. The unit ships with the required sensors and a firewall mount (part 52-43540) for straightforward installation.
![[Product front view showing all components]](https://www.prismstore.store/wp-content/uploads/2026/06/cdb9b998978642ca9b7a01fbdef5dbd6.jpg)
Usage
Designed for both street‑legal vehicles and performance race cars, this gauge thrives in harsh environments. Whether you’re navigating city traffic, tackling a track day, or simply monitoring engine health during a long road trip, the waterproof construction ensures consistent performance. The dimmable backlight reduces glare at night, making it ideal for drivers who demand visibility without distraction. Install it behind the dashboard firewall using the included mount for a clean, professional look.
Why Choose Us
Longacre combines decades of automotive gauge expertise with modern LED technology. Each gauge undergoes rigorous quality testing to guarantee accuracy and durability. Our waterproof sealing meets OEM standards, protecting internal electronics from moisture and dust. We stand behind our product with responsive customer support and a comprehensive warranty, ensuring peace of mind for every purchase.
Key Features
- Waterproof design eliminates gauge removal for car washes, saving time and effort.
- Bright LED digits with dimmable backlight provide clear visibility in all lighting conditions.
- Compact 2.5 inch size fits standard dashboard openings without modification.
- Includes all necessary sensors and a firewall mount for quick, tool‑free installation.
- Longacre customer support and warranty ensure reliable after‑sales service.
FAQ
Is the gauge compatible with all vehicle makes?
Yes, the 2.5 inch diameter fits most standard dashboard openings, and the included firewall mount adapts to a wide range of vehicle models.
Can the brightness be adjusted while driving?
The dimmable feature can be set to your preferred level before driving; it is not adjustable on the fly to maintain safety.
What is the warranty period?
Longacre offers a one‑year limited warranty covering manufacturing defects and electronic failures.
Do I need additional tools for installation?
All necessary hardware, including the firewall mount and sensors, are included. Basic hand tools are sufficient for mounting.
Will the gauge work in extreme temperatures?
The gauge is rated for typical automotive temperature ranges and its waterproof sealing protects it from both heat and cold exposure.




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