Density tester ADT

temperaturemoisturemass

Density testing is made simple with the TA Instruments fully Automated Density Tester. Density testing is made simple with the TA Instruments fully Automated Density Tester. This fully programmable, automated system measures the density of cured rubber materials using the finite difference (buoyancy) method. Active measurement of the fluid temperature increases accuracy by accounting for small changes in the density of the immersion fluid with temperature. Test Method - Finite Difference (buoyancy) ISO 2781 ASTM D1817 Sample diameter 30 – 45 mm Sample thickness 3 – 6 mm Measurement range < 1.0 g/cm3 to 2.5 g/cm3 Autosampler capacity 20 30 (optional) Fluid Temperature Measurements Standard The finite difference method for density measurement relies on the measurement of sample weight dry, and immersed in a fluid, usually water. The difference between the dry and immersed weight is used with the known density of the fluid to calculate the volume of the specimen to a high degree of accuracy, irrespective of geometry. A double gripper and carriage system is used to guarantee that dry weight values are entirely uninfluenced by system moisture or cross-contamination. Each sample is fully wetted by a user-defined number of separate immersions prior to immersed-mass measurement. This prevents error brought about by incomplete wetting and improves both accuracy and precision.