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Q & A: Hydrometer reading for a lead-acid cell?

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Most recent answer: 12/11/2015
Q:
Hydrometer shows the range from 1100 to 1300. Is it correct? . What is the range of sp. gravity for a lead acid cell?
- sudeesh (age 32)
kerala, India
A:

Acid cell typically has a sulphuric acid based electrolyte, so it is mostly water. As the hydrometer reports the ratio of the specific gravity of your specimen to that of pure water, you should expect seeing something slightly larger than 1. I therefore presume you meant 1.100 and 1.300.

Those values seem reasonable, refer to the table in here: http://batteryuniversity.com/learn/article/how_to_measure_state_of_charge.

Tunc


(published on 12/11/2015)

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