Battery Hydrometers

A Battery Hydrometer is an essential tool for any flooded lead-acid battery system. The hydrometer is used to measure specific gravity (density) of the electrolyte, which can be interpreted to indicate the battery's state of charge (SOC). It can also be helpful in diagnosing problems with the battery and its charging system. Our Ez-Red hydrometer is particularly easy to use, while the Flow-Rite hydrometer is specifically designed to work with Flow-Rite battery watering systems.