Asker XP-D High Performance Hardness Testers from Hoto Instruments, Type D with Peak Indicator

• Model X-A  Type A Normal rubber
• Model X-D  Type D Hard rubber and plastics
• Model X-C  Type C Soft rubber and sponge
• Model X-F  Type F Urethane foam, sponge and polystyrene foam

Asker Hardness testers from Hoto Instruments feature portable design, ease of operation, non-destructive measurement and optional peak indicators.

The Asker High Performance series hardness tester has an accuracy of  ±.75 point and is available in Type F for soft materials like sponge rubber and urethane foam.

Asker Type F hardness testers use their own weight to determine hardness

Hardness Tester Operation

As the hardness tester is pressed against the sample, the material resistance force and indentor spring load balance. The depth of the indentor is measured, which provides a measure of the materials hardness. Values are based upon a 100 point scale (accuracy ±.75 point). However, as time elapses the indicator will "creep" back so that a reading taken a few seconds after the tester makes contact with the sample will be less than the peak reading. The optional peak indicator helps to more closely monitor the difference between peak and "creep" in hardness tests.