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Precision battery hydrometer for testing the solution content in
each cell. Graduations: - 0.005 g/ml; Red: - Ranges from 1.100 - 1.205.
indicating the battery is discharged. White: - Ranges from 1.205 -
1.260. indicating that the battery requires attention. Green: - Ranges
from 1.60 - 1.300. indicating the battery is fully charged. Calibrating
should be carried out at 20 Deg C. Care must always be taken when
removing battery cell caps and when testing. Manufactured with a glass
tube, PVC bulb and spout.