Automated Hardness Tester
The AHT Automated Hardness Tester streamlines the measurement of Shore A hardness for cured rubber materials. This fully programmable, automated system measures the hardness of cured rubber materials according to all international standards for Shore A hardness. Each measurement involves the determination of a user-defined number of single point Shore A values. The individual readings, mean and median of this set are reported for each sample.
Test Method - Shore A - SO 868, ASTM D2240, ISO 7619 NFT 51-174, BSI BS 903-A26
Sample diameter - 30 – 45 mm
Sample thickness - 4 – 6 mm
Indenter - Hardened steel rod, Truncated 35° cone, 0.79 mm diameter
Measurement range - 0 – 100 Shore A
Pressing force - Contact pressure, pressure weight: 12.5 N Spring Force: 8.065 N
Resolution - 0.1 Shore
Autosampler capacity - 20 or 30
An automatic sample feed with 20-sample capacity provides sequential, reliable, unattended measurements. An optional 30-sample upgrade extends automation to even larger sample sets. Software-driven test set-up, data collection, and pass/fail criteria make the AHT Automated Hardness Tester a truly automated system.
Automated Shore A Hardness
Shore A hardness measurements are based on the precise application of force and the subsequent measurement of probe displacement.
A 12.5 N weight is applied to the measurement device that consists of a hardened steel probe of a prescribed shape. The measurement is performed multiple times, with the sample being rotated automatically between measurements to ensure representative sampling. The individual values, and the mean and median for the specimen are reported for each sample.