ASKER Durometer Type DL

The Type D Durometer for hard rubber (high hardness) and plastics

Used world-wide for measuring hard rubbers and plastics, and specified in the standards of JIS K 6253, ASTM D 2240, ISO 7619, DIN53505, etc.
Rating: Not Rated Yet
Height: 2.50mm Shape: Sharp Cone Point
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 6253
JIS K 7215
ASTM D 2240
ISO 7619
ISO 868
DIN 53505
Indication range 0 point - 100 point (262 degree dial scale)
Minimum indication 1 point (Accuracy : ±1 point)
Indentor Design (mm) Height: 2.50 30°Angle Sharp Cone Point Tip Radius 0.1
Spring Forces [mN(g)]
0 point: 0(0)
100 point: 44500(4538)
Central hole of diameter of Pressure foot Φ3
Pressure foot
Dimension (mm)
Φ12 Longer foot type Length: 18
Outer Dimension (mm) Approx. Width 57×Depth 30×Height 94
Weight (g) 200
Application hard rubber, plastic

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

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.
Constant Loader for Durometer
· Constant loarder assures uniform test pressure eliminating false readings due to differences between operators in measuring by hand.
· High accuracy and repeatability of the hardness readings are assured by the flexible joint function.
Indentor Extension Tester
· The gauge to check the indentor height on a durometer and the reading indicator mechanism.
· Inspection is conducted at 2, 50, and 100 points respectively.
Load Tester for Hardness Tester
· Tester to check load properties of the spring on a durometer
· Inspection is conducted at 2, 50, and 75 points respectively.


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