Based on the Type A:

Below is a comparison table of measurement data. It is impossible to prove the exact correlation between the each type to type data, since the measured data may be affected by manly factors such as temperature, humidity, size and shape at the measurement, and the conditions of vulcanization.

Use The below table for your reference concern the equivalency of measurement data from each to type of DUROMETER.

The Teclock Durometer requires testing surfaces to be of sufficient thickness to ensure proper test sensitivity.  Usually test materials must be at least 1/4" (6mm) thick, an exception may be made for harder materials.  Materials thinner than 1/4"  may cause the Durometer to read the surface below the sample instead of the sample itself, producing a false test result.  Stacking thinner samples to the minimum thickness required will ensure accurate readings.

Proper Measurement

Mechanism of the hardness measurement. *The indenter gives a distortion onto the surface of the sample with the presser foot and  pressure produced by the spring load. *The sample produces a resilient force against the pressure load. *The "hardness" means the depressed amount of the indenter at the time when the resilient force becomes equal to the pressure load.  Thus, the value will consequently reflect the "physical amount" with no unit.

How to read the value. *The size of the presser foot directly relates to the amount of pressure being applied and  therefore the amount of resilient pressure being reflected.  The biggest presser foot, type D, C and DO have the largest load and the smallest foot, type OO has the weakest load.

Choosing the right Durometer. Teclock offers a wide selection of Durometers to choose from, ensuring accurate test results for every application.   When choosing the right Durometer for your needs, consider these different types: Peak Pointer (G) Type, Self Weight Type (Type FO), Digital Type or the Deep Hole, Long Leg Type.

The Peak Pointer (G) Type retains the maximum value after testing, making readings possible when the indicated value decreases after fitting, and the maximum value becomes difficult to read.  This type is also ideal when the reading is visibly blocked  by an object.  When measuring foam applications the Self Weight Type is the ideal choice. Using its own weight as the measuring load, all that is needed perform an accurate test is to simply place the Self Weight Durometer on the sample. A large presser foot (80mm diameter) maintains a stable measuring posture, while a large flat cylindrical cone (25.2mm) indicator senses the hardness.  The Digital Type produces the highest accuracy by automatically implementing a maximum value holding function.  This also makes it possible to observe the stress relaxation of hardness.  The Deep Hole Type or Long Leg Type make accurate testing possible when obtaining an even or sufficiently wide sample surface is not available.  Both the Deep Hole and Long Leg Type are provided with a Peak Pointer and upper/lower limiters. The Deep Hole Type allows to measure down to 30mm while the long leg can reach down to 100mm.

Eliminate variation in user skill level with the Durometer Constant Loader GS-710.

The Durometer Constant Loader GS-710 applies a constant speed and load making it useful in eliminating the dispersion caused by varying operator's skill levels.  Measurement for the Durometer type A, E, B, O and SRIS is possible with 10N (1,000gf) of static load.  When using with type D, DO, and C Durometers an optional weight of 50N (5,000gf) is possible.  Load values are specified in the standards of ISO, ASTM and JIS.

Optional Durometer Tester, GS-707 Series makes it easy to test for proper calibration.

This easy to use machine allows you test your Durometer for proper calibration with one simple step.  By placing the Teclock Durometer upside down on the test table, you can easily inspect whether the display is reading properly at 25, 50 or 75 loads.  Each load is pre specified with standard weights.