Laboratory testing instrument manufacturer106-C Raja Dinendra Street, Kolkata – 700004, India

Testing instrument manufacturer+91 98310 09675 , +91 84201 44822

IRHD Hardness Tester


The IRHD Hardness Tester works on the principle behind determination of hardness by load apparatus is based on the measurement of the diff between the depth of indentation of a standard ball into the rubber under a small contact force and a large indenting force.

IRHD Hardness tester is a table model type tester. IRHD Hardness Tester is specifically used in rubber testing Companies.


  • Diameter of indentor: 2.50(+/-) 0.01mm
  • Diameter of pressure foot: 20(+/-) 1mm
  • Diameter of central hole of pressure foot: 6 (+/-) 1 mm
  • Force on foot: 8.3 (+/-) 1.5 N
  • Force on Ball (Contact : 0.30(+/-) 0.02N) (Indenting : 5.4(+/-) 0.01N (Total : 5.70(+/-) 0.03N)
IRHD Hardness Tester