BRAND : ASKER (Made in Japan)

TYPE    : C


The ASKER Durometer Type C, produced since 1956, is our original brand durometer, and is a de facto standard in the world for the measurement of soft rubber, sponges, etc.

Widely used for measuring soft rubber, sponges, and other foam elastomers, as we
Height: 2.54mm Shape: Spherical
Pressure foot
The Pressure foot in contact with the specimen is 44mm in width and 18mm in depth, wide enough to ensure accurate measurement. The Longer Pressure Foot Type (C1L type)is applicable for measurement of narrow or concave specimens.
Hardness Tester Selection Chart
Our product line consists of various types of durometers applicable to specific materials
as indicated in the chart above.

Type A Durometer (ASKER A type), conforming to JIS K 6235 is the most popular type of durometer for measuring rubber hardness.

However, verification is recommended because a significant difference is estimated to be the largest when a durometer indicates measurement values from 10 to 90 points.

For hard specimens for which Type A Durometer readings indicate more than 90 points, measurements should be undertaken using the Type D Durometer (ASKER D type). However, for soft specimens with measurements of less than 20 points, the ASKER C type or Type E Durometer (ASKER E type) should be used. The most important consideration in using durometers is to select the correct type for purposes of measurement according to the specimen.

Standards JIS K 7312
JIS S 6050
Indication range 0 point - 100 point (262 degree dial scale)
Minimum indication 1 point (Accuracy : ±1 point)
Indentor Design (mm) Height: 2.54 5.08 Dia. Spherical
Spring Forces [mN(g)]
0 point: 539(55)
100 point: 8379(855)
Central hole of diameter of Pressure foot Φ5.5
Pressure foot
Dimension (mm)
Outer Dimension (mm) Approx. Width 57×Depth 30×Height 76
Weight (g) 200
Application soft rubber, urethane foam, sponge, rolled-threads, film rolls and pottery clay, footwear

Outer Dimension (mm)
A custom designed pressure foot durometer is available according to specimen conditions.


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