The Checkline HPSAO Shore AO Durometer Conforming to ISO7619-1 Test Standard is ideal for determining the Shore surface hardness of foams, steering wheels and inner linings of motor vehicles with hardness less than 20 Shore A. For measuring the hardness, the spring-loaded outer ring of the housing is pressed downwards until the edge of the ring meets the colored marking on the housing. This ensures a constant pressure and prevents measuring errors. The principle used to measure shore hardness is based on measuring the resistance force of the penetration of a pin into the test material under a known spring load. The amount of penetration is converted to hardness reading on a scale with 100 shore units. As the depth of indentation is max. 2.5 mm the test material has to have a minimum thickness of 6 mm. If thickness is less stack some samples til you reach the required thickness.
