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September 20, 2021
  All Categories  >  Aggregates Testing  >  Density and Specific Gravity
  Product Information
SSDetect System
Model: ATSG-2
Price: Discontinued by MFG
Condition: New
Warranty: Yes
Availability: Usually ships in 6-14 days
  The saturated surface dry condition tester is a two-part, automated system which provides the necessary data to determine: Bulk Specific Gravity (dry), Bulk Specific Gravity (SSD), Apparent Specific Gravity, and Absorption of the fine aggregate.

All in about one hour!

The SSDetect system participated in a ten Lab Nation-Wide Round Robin Study sponsored by NCAT.
· Data generated from the Round Robin study has shown the SSDetect system to be 50% more repeatable and reproducible than traditional methods performed in the study.
· Fast, Accurate, Repeatable and Reproducible results !!!

The Thermolyne SSDetect is the only system on the market today that "directly measures" the saturated surface dry condition of the fine aggregate. This is done by way of an infrared light source "tuned" to water. This infrared signal "looks" at the surface of the aggregate for traces of water. By measuring the amount of infrared reflectance, the Saturated Surface dry condition can be accurately measured time after time. Using a light source, of a specific wavelength, to detect specific trace elements is a proven science that has been used for many years.

The user begins with two samples of the desired material, dried to a constant mass. One sample is placed in the special volumetric flask (provided), filled with water to the calibrated line and weighed. Mount the flask to the mixing platform of the Automated Vaccum Mixer (AVM). Press the start button and the AVM will automatically mix and vaccum the sample until it has reached the Apparent Specific Gravity condition. Remove, refill the flask and weigh.

The second sample is placed in the special bowl provided with the SSD device. This sample and bowl is weighed and then mounted to the mixing platform of the SSD device. Information derived from the AVM test will be used and entered into the SSD device. This is known as the film thickness coefficient . The user then places the lid on the test bowl and closes the door of the SSD device. Press start and the unit will begin mixing the sample in the bowl and injecting small amounts of water into the material, allowing it to absorb water until it reaches the Saturated Surface Dry condition. The infrared signal is looking at the material during the mixing/water injection process for trace amounts of water to begin to build on the aggregate surface. Once a stable SSD condition has been reached the unit will automatically stop and alert the user. The test bowl is then removed and weighed, the net weight of the material is the weight at SSD. You have now obtained all of the values necessary to determine the Bulk Speicific gravity and absorption of the fine aggregate.
  • The “dry to wet” method provides even wetting of the material
  • Once SSD is achieved, sample is poured into the pycnometer for the under water weight measurements
  • The software in this system has been designed to accommodate a wide range of materials
  Testing Standards
  • Scroll below and click on the round robin study by NCAT


  • SSD Mixwr 100-230V - 50/60 Hz
  • AVS Mixer 120V/60Hz (Inquire for 230V/50 Hz)

Included Accessories

  • Two test bowles
  • One 500 ml volumetric flask
  • Lab clamp and vertical stand
  • 500g of calibration sand

Additional Documentation

Click here to see NCAT's round robin test results


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