Shore and IRHD Hardness Testers

Hardness Testing of Plastics and Rubber – Accurate, Portable, and Compliant with Standards
ZwickRoell’s hardness testers for plastics, rubber, and elastomers—available through ZRS Testing Systems—offer reliable and standardized measurement of Shore and IRHD hardness. These methods are essential for quality control of low-stiffness materials, where traditional hardness testing methods are not applicable.

The measurement is performed by pressing an indenter into the test material, and the indentation depth is used to calculate the hardness value. This provides a quick and effective indicator of the material’s mechanical properties—which is particularly important in production, inspection checks, and material comparisons.

Whether you need a A simple solution for rapid inspection testing or more stable measurements in a laboratory setting, we offer the right model—with full support from ZRS for calibration, consulting, and technical service.

​Our instruments—from portable to fully automated
For these methods, we offer, among other things, the ZwickRoell 3105 Combi Test—a microcomputer-controlled hardness tester with very high measurement accuracy for multiple IRHD ranges (including supersoft) and Shore measurements. For easier use, we offer analog Shore testers with or without a dial gauge—ideal for testing directly on the component, even in hard-to-reach locations. Our digital Shore testers can be connected to testXpert III for seamless data transfer and result documentation.