Hydrometer Analysis of Soils Test Equipment

The basic equipment needed for hydrometer analysis in conformance with ASTM D7928, ASTM D422, and AASHTO T 88 standards includes a Stirring Apparatus, Soil Hydrometers, Hydrometer Sedimentation Cylinder, Sodium Hexametaphosphate, and a Constant Temperature Bath. Soil specimens are mixed in a solution of water and sodium hexametaphosphate.

• Sodium Hexametaphosphate is a dry powder dispersion agent used in mixing soil sample solutions.
• Dispersion Cup for Soil Dispersion Mixer with the 1L capacity to hold soil samples for testing.
• Soil Dispersion Mixer thoroughly mixes soil samples with a mixing blade.
• Sedimentation Cylinder also called a hydrometer jar, is used with the soil hydrometers for testing suspended solids.
• Soil Hydrometers measure suspended solids during testing. Select from models with a range of 0.995—1.038 or -5—+60 g/L.
• Constant Temperature Bath maintains the uniform temperature in hydrometer testing.
• Pocket Digital Thermometer has a temp. temperature range of -40°–500°F (-40°–260°C) with an accuracy of ±1°F, ±0.5°C. It has max/min memory along with a LCD screen. 
• 300ml Glass Beaker can be used for mixing the soil specimen with water and sodium hexametaphosphate.
• Mortar and Rubber Pestle for air-drying preparation of the sample which can be used to break up dried clumps of soil to pass a No. 10 test sieve.
• Replacement Blade can be used with SA-14 Stirring Apparatus for any damage suffered to the existing blades. 
• No. 10 Test Sieve used for moist preparation of the sample for working through the clay particles to maintain the moisture.
• No. 200 Test Sieve is used for washing the dry specimen through and collecting the reduced sample.
• Additional ASTM Test Sieves are needed for testing, refer to test methods.

For more information on Hydrometer Analysis of Soils Test Equipment, here are our related blogs:

• Soil Hydrometer Testing: Sedimentation Method Techniques & Equipment