Review on 🔋 Universal 12V Electrical Voltmeter Gauge | 2" 52mm | IP67 Waterproof | White Background | Red/Yellow Backlight | Negative Ground Systems | Ideal for SUV, RV, Boat, Yacht, and House-boating by Bradley Wacks

I bought this and the tank level sensor from the same company. It was installed during the restoration of my sailboat's engine control panel. (The engine stop bar has not yet been installed in the photo.) The gauge is fairly accurate and has a nice backlight. It has currently been exposed to heavy rain, fog and seawater for about 3 weeks with no sign of fogging or flooding. Time will tell if it will hold up or not, but for the price it's worth a try.