Presto Stantest Private Limited offers International Rubber Hardness Degrees Tester with spherical indenter. Presto Stantest Private Limited is an ISO 9001: 2000 certified company. The instrument has a spherical indenter which indents the sample under a minor and major load. The differential indentation depth is measured and tabulated to read directly in "IRHD" degrees. The displacement or IRHD degrees conversion table is published in ISO 48: 1994.
