The patented O-Ring centering device is compatible with the IRHD-MICRO tester. O-Rings with a cord dia. of 0.6 mm to 8 mm are placed on the measuring table and pushed to the positioning pin. The cord dia. is entered into the MICRO IRHD software. Integrated electric motors precisely move the measuring table to the measuring axis. This results in measuring the highest position of the O-ring.