An ammeter is an essential part of an HHO system that will allow you to keep track of the amount of current your hydrogen generator is drawing from your vehicle's electrical system and is indispensable for adjusting the electrolyte concentration.

By monitoring and adjusting the amperage draw of your hydrogen generator, you can prevent cell overheating, melted wires, blown fuses and thermal runaway.

This ammeter gauge features the following:
50 Amp capacity
Large, easy to read numbers
Backlight display
2 1/4" diameter all metal housing
Installation instructions
Mounting hardware and fasteners included