Flooded lead-acid batteries are used in most vehicles due to their low cost and deep cycle capability. The electrolyte used in these batteries is diluted sulfuric acid. In order for the battery to function properly it is important that its charge be maintained and the acid always cover the plates. If this is not done, the plates will end up with a deposit of lead sulfide and the battery will fail.

The H2O in the diluted acid will gradually be reduced due to out-gassing during charging or simple evaporation and must be replaced on a regular basis. This means that in olden times the filler cap over each cell had to be removed, the acid level checked, and distilled water added. Great care had to be exercised to prevent damage to personnel and clothing due to the acid.

Hydro-Eye probes solve the problem of unnecessary inspections by providing a simple probe that is immersed in the acid itself. The probe replaces the filler cap and contains one or two LEDs to show the operator whether or not there is sufficient acid in the battery.

Using Hydro-Eye probes you can MAINTAIN BATTERY LIFE and CUT COSTS. Hydro-Eye probes are warranted for five years. If your battery wears out, install the old probe in the new one.