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// Medidores
de dureza - Portables - Serie EX
Asker
Durometer Hardness
Measurement – Super EX Series
Model EX-A* Type Shore A Normal rubber
Model EX-D* Type Shore D Hard rubber and plastics
Model EX-C* Type Asker C Soft rubber and sponge
Asker is one of the leading manufacturers of
hardness testers in the wo rld.
Asker design and precision manufacturing offers
you a reliable, highly accurate duromater.
Super EX durometers feature portability, ease
of operation, non-destructive measurement and
optional peak indicators. They are heavy-duty
with high repeatability.
Super EX models are available in Durometer Types:
Shore A, Shore D and Asker C.
Hardness is an essential characteristic of various
rubber, elastomers and plastic products.
The first step in using a hardness tester is
to select the optimum type based upon the material
hardness.
*Add “P” to the model number to specify optional
peak indicator, for example EXP-A.
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| Durometer Selection |
Durometer Standards |
Type |
Standards |
Measuring
Force |
A |
ASTM D-2240 |
1 Kgf |
D |
ASTM D-2240 |
5 Kgf |
Asker C |
JIS K-7312 |
1 Kgf |
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Super EX with optional
Indentor Type peak
indicator |
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Operation
As the durometer is pressed against the sample,
the material resistance force and indentor spring
load balance. The depth of the indentor is measured,
which provides a measure of the material’s hardness.
Values are based upon a 100 point scale (accuracy
±1 point). However, as time elapses the indicator
will “creep” back so that a reading taken a few
seconds after the indentor makes contact with
the sample will be less than the peak reading.
Asker durometers offer a peak indicator as an
option to more closely monitor the difference
between peak and “creep”.
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