PTC® Durometers / Shore® Hardness Scale
A durometer is an instrument for testing the hardness of various plastics & rubber. ASTM D2240 Standard Test Method for Rubber Property, Durometer Hardness. This test method covers twelve types of rubber hardness measurement devices known as durometers.
Video: How to Use a Durometer
PTC® Instruments manufactures durometers to meet or exceed ASTM D2240 and offers A2LA calibration services accredited to ISO/IEC 17025 ANSI/NCSL, Z540-1.
For more information download the PDF's Durometer Types & Specifications and Typical Examples of Materials Tested with a Durometer