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It’s Rock Science. Not Rocket Science.

Barnstead|Thermolyne SSDetect System

The Barnstead|Thermolyne SSDetectis the only system on themarket today that “ directly measures ” the saturated surfacedry condition of the fine aggregate. This is done by way ofan 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, theSaturated 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 materialdried to a constant mass. One sample is placed in the spe-cial volumetric flask (provided), filled with water to the calibrated line and weighed. Mount the flask to the mixing platform of the Automated Vacuum Mixer (AVM). Press the start button and the AVM will automatically mix and vacuum 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 andbowl 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 thicknesscoefficient . 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 con- dition. 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 specific gravity and absorption of the fine aggregate.

Ordering Information

Model #Dimensions Inches (cm)Electrical RequirementsOperating ClimateWeight Lbs. (kg) M120227W - 14.5H - 14.25D - 17.25 100-240V,50/60 HZ17°C to 37°C22 lbs.(SSDetect)(36.8 cm)(36.20 cm)(43.82)25 watts,0.442 amps (max.)RH = 20-80%(9.97)M134825W - 18.5H - 11.15D - 17.00120V17°C to 37°C43 lbs.(AVM)(46.9 cm)(28.3 cm)(43.1 cm)RH = 20-80%(19.5)Accessories included:two test bowls,one 500 ml volumetric flask,lab clamp and vertical stand.500g of calibration sand. 2555 Kerper BoulevardP.O. Box 797 Dubuque, Iowa 52001-0797 U.S.A. 800-553-0039 – 563-556-2241 www.barnstead.com SSL2442 • 11/03