Product Description

Conforms to Asker / JIS Specifications
Rex Asker Durometer

Conforms to Asker / JIS Specifications
Asker C, Asker CD, Asker F & Asker JA models available

The Asker C Type durometer is commonly used in checking the hardness of rubber material found in gym shoe soles. The Asker F Type durometer is primarily used to check the hardness of polystyrene foam. Analog and Digital Models available.

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  • Available in analog and digital models
  • Precision construction
  • Custom made carrying case
  • 0-100 Point Scale


Indication Range 262 degree dial scale
Minimum indication 1 point (Accuracy : ±1 point)
Pressure foot Dimensions 44 x 18mm Rectangular
Outer Dimensions Approx. 57 x 30 x 76 mm (W x D x H)
Mounting Thread M6 P1
Weight 200 grams


Model F
  • Urethane Foam
  • Sponge
  • Non-woven Fabric
  • Model FP
  • Powder Puff
  • Exclusive type for foam materials, allowing measurement by placing the tester on the object of measurement. In addition to Model F, Model FP is available for powder puff.
    Model C & Model C2
  • Soft Rubber
  • Urethane Rubber
  • Sponge
  • Wound threads (yarn package)
  • Rolled Films
  • Potter's Clay (Kaolin)
  • Model C is intended for hardness measurement of Soft Rubber, sponge, foamed elastomers, wound threads(yarn package), rolled films, potter's clay(kaolin) and other such soft materials.
    For even softer materials, Model C2 is available.
    Model CS
  • Polystyrene Foam
  • This features larger indentor and a more strong spring compared to Model C, thereby making it more suitable for polystyrene foam.
    Model A
  • Rubber in general
  • Softer plastics
  • Has been used for wide applications since being standardized in the ISO.
  • Rubber in general
  • Softer plastics
  • A hardness tester which conforms with the Japanese Industrial Standards JIS K 6301. One of the most popular types in Japan, but has recently been gradually replaced with the ISO-specified Type A.
    Model JAL
  • Rubber in surfaces)
  • Especially useful for recessed and/or smaller measurement areas. In addition to the standard Model JAL, long presser foot type are available for another Model applications.
    Model B
  • Semi-rigid Rubber
  • Unglazed pottery clay
  • It uses the same spring load used in Model A. It adopts a conical indentor similar to that of Model D, so as to be applicable to harder measuring objects than can be measured by Model A. It is useful for hardness measurement of unglazed pottery clay and ceramics in green condition.
    Model JC Semi-rigid Rubber  Model JC has those hardness testers described in JIS K 6301 as 'suitable for samples found to have a hardness value above 70 according to Model A'. It features higher resolution for hardness measurement of hard rubber.

    Model D
  • Hard Rubber
  • Plastics
  • Similar to Model A, this model is defined as 'Durometer Type D' as described in various domestic and international standards. It is in widespread use for hardness measurement of plastics and hard rubber.