Z-1G: Manual Hydrometer

Hydrometer for Measuring Specific Gravity

Hydrometers (density meters) measure the specific gravity of liquids. Specific gravity is the ratio of the density of the liquid being tested to the density of water. In the case of battery testing, the hydrometer is measuring the specific gravity of the battery’s electrolyte. The higher the acid concentration in the electrolyte, the higher the specific gravity.

Based on the specific gravity, the user can determine the state of charge of the battery.

Retaining hydrometer readings and data over time is recommended by IEEE as part of any Battery Maintenance Program.

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Application Information

construction diagram of manual hydrometer

A scale inside the stem makes it easy to read specific gravity.

  • Scale 1.100 – 1.350
  • Note: .005 Subdivisions


  • Industrial grade hydrometer
  • Virtually unbreakable
  • Built with polycarbonate barrel and special heavy-duty glass float that can withstand drops from 10 ft.
  • Scale: 1.100 – 1.350 with .005 subdivisions
Ordering Information
Part No. Scale Description
Z-1G 1.100 – 1.350 Industrial grade hydrometer with heavy duty glass float
1353 -20° – 130° F Thermometer, includes S.G. correction factor table
Name Z-1G: Manual Hydrometer
Model Number Z-1G