ASKER Durometer Type FP

The ASKER Durometer Type F for much softer specimens (low hardness) gives accurate readings as it features a larger indentor and pressure foot.

Pressure foot plate is designed to be smaller in dimensions and an oval shape in accordance with the size of
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The ASKER Durometer Type F is specified exclusively
for powder puff.

There is no need to press the durometer into the specimen, but just to place it onto the specimen. As it is soft, the weight of the durometer constitutes the pressure to the specimen.

It has recently been used additionally for gel materials, soft rubber rolls, etc.
Height: 2.54mm Shape: Cylindrical
Pressure foot
An oval shaped pressure foot(50mm x 37 mm) in contact with a specimen allows a stable measurement by placing it onto the specimen.
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.

Indication range 0 point - 100 point (262 degree dial scale)
Minimum indication 1 point (Accuracy : ±1 point)
Indentor Design (mm) Height: 2.54 15 Dia. Cylindrical
Spring Forces [mN(g)]
0 point: 980(100)
100 point: 1960(200)
Central hole of diameter of Pressure foot Φ16
Pressure foot
Dimension (mm)
50×37(Oval shaped)
Outer Dimension (mm) Approx. Width 50×Depth 37×Height 81
Weight (g) 300
Application Powder puff

Two-pointer type (max-hand and active hand) of Rubber Hardness Tester
The stationary set hand (max-hand) makes the maximum value easier to read and allows the creep characteristics of a specimen.

Accurate measurement is made possible for specimens* for which stress relaxation occurs over time or for specimens for which it is difficult to take readings from the front.

*Materials for which the reading decreases immediately after the indentor has been pressed against the surface.


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