Standard Test Methods for Specific Gravity of Water and Brine.

These test methods cover the determination of the specific gravity of water and brine free of separable oil. There are 4 methods, where Method D uses the hydrometer method. The range of the used hydrometers starts at 22 up to 27

The test is performed at 15,6°C or 60°F

The purpose of the standard is to determine the specific gravity of brine solutions and indirectly calculate the salt concentration

This is used in quality control in industries such as:

1. Oil and gas
2. Salt production
3. Cooling systems
4. Water treatment

The measurement is based on the buoyancy principle (Archimedes’ principle):

1. A hydrometer is placed into the sample.
2. The instrument floats higher or lower depending on the liquid density.
3. The hydrometer scale directly indicates the specific gravity (SG).

Temperature correction is required.

Main Features:

• Small footprint
• Wide temperature range
• Detachable spill tray
• Easy to drain and clean
• Hydrometer visible over full length

An overview of the ASTM density methods can be found here Density table

The Tamson ASTM D1298 apparatus is available in the following voltages/frequencies:

• Tamson ASTM D1298 230V/50Hz (P/N: 00T2000)
• Tamson ASTM D1298 230V/60Hz (P/N: 00T2001)
• Tamson ASTM D1298 115V/60Hz (P/N: 00T2002)

See tab "More Information" for the specificationsheet and manual