Durometer
Definition
A durometer is an equipment that is primarily used for measuring the hardness of materials that are made up of materials such as: elastomers; polymers and rubbers. It is also called as “Shore Durometer”. If the durometer scale shows high figures, it indicates that the material has the greater resistance to indentation. Similarly, if the durometer reading is low, it indicates that the material is a soft material and have less resistance.
Explanation
A durometer is used when the resistance capacity of any plastic, rubber or elastomeric material has to be checked and it is to understand if the material is hard or soft material. The standard test for checking the rubber property and durometer hardness test is ASTM D2240 Standard Test Method. This test consists of 12 types of hardness measurement devices called as Durometers. The types are as follows:
Durometer Type / Scale
Durometer Hardness
Type A
20-90A
Type B
Above 90 A Below 20 D
Type C
Above 90 B Below 20 D
Type D
Above 90 A
Type DO
Above 90 C Below 20 D
Type M
Above 90 C Below 20 D
Type O
Below 20 DO
Type OO
Below 20 DO
Type OOO
Below 20 DO
Type OOO-S
Below 20 DO
Type CF
ASTM F1957
Type SL
ASTM F1957