Checkline Durometer Testers

F.A.Q.

Why does ASTM D2240 recommend omitting Durometer readings below 20 or above 90?

 Per ASTM D2240 Section 9.3, indentation readings below 20 or above 90 on any given Shore scale lose linearity at the extreme ends of spring travel. If your material tests above 90 on a Shore A Durometer, switch up to a Shore B or Shore D scale; if it reads below 20 on a Shore A Durometer, step down to a softer scale such as Shore O, Asker C, or Shore OO.

What is the minimum sample thickness required for standard Shore A and Shore D testing?

 Standard Shore A and Shore D indenters require a minimum specimen thickness of 6 mm (0.24") so the hard surface of the test table does not influence the reading ("anvil effect"). While thinner layers can be stacked (up to 3 plies) if the surfaces are completely flat, the most accurate solution for specimens as thin as 0.050" (1.25 mm) or small O-rings is a Type M Durometer (Rex 1600-M or Rex DD-4-M) mounted in the Rex OS-3 Type M Test Stand.

What is the difference between a standard dial Durometer and a Max-Hand (Memory Pointer) model?

 A standard dial gauge like the Rex 1600 has a single active pointer that shows live hardness as long as the presser foot is held against the specimen. The Rex 2000 Max-Hand Shore Durometer (which replaced the RX-1700) adds a second peak-hold pointer that locks at the maximum initial reading while the active pointer creeps downward, allowing the operator to record both peak hardness and material relaxation (creep) simultaneously.

What is the difference between a Durometer Test Block and a Durometer Verifier?

 Color-coded rubber test blocks (included with most Durometers) allow operators to perform a quick daily functional check to confirm the indenter and spring "feel" are operating properly, but they should not be used to recalibrate a gauge. To formally verify and certify the spring load accuracy of Shore A and Shore D probes across 10 to 90 Durometer units in-house, use the electronic load-cell-based DeFelsko SHDVERIFY PosiTector SHD Verifier Kit.

Checkline AD-100 Shore Durometer Tester

$539.00 - $589.00
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Checkline AD-100 Shore Durometer Tester
Checkline AD-100 Shore Durometer Tester
  • Checkline AD-100 Shore Durometer Tester
  • Available Scales: A, B, C, D, DO, O, OO & Asker C
  • Can be used in any measurement orientation as gravity does not affect readings
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Checkline DD-100 Digital Shore Durometer Tester

$1,293.00 - $1,425.00
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Checkline DD-100 Digital Shore Durometer Tester
Checkline DD-100 Digital Shore Durometer Tester
  • Checkline DD-100 Digital Shore Durometer Tester
  • Available Scales: A, B, C, D, DO, O, OO and Asker C
  • Can be used in any measurement orientation as gravity does not affect readings
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Checkline HP Shore Durometers

$622.00
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Checkline HP Shore Durometers
Checkline HP Shore Durometers
  • Checkline HP Series Shore Durometers
  • Available Scales: A, B, C, D, DO & O
  • Manufacturer: Checkline
  • Warranty: One Year
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Checkline AD-300 Precision Durometer

$825.00 - $875.00
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Checkline AD-300 Precision Durometer
Checkline AD-300 Precision Durometer
  • Checkline AD-300 Precision Durometer
  • Measures according to 
    DIN 53505 (A, D) 
    ISO 868 (A, D) 
    ISO 7619 (A, D) 
    ASTM D 2240 (A, D, C, O).
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Checkline DD-300 Digital Precision Durometer

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Checkline DD-300 Digital Precision Durometer
Checkline DD-300 Digital Precision Durometer
  • Highly accurate and repetitive
  • Timer function to take measurement after (0-15) seconds
  • Conform to DIN ISO 7619-1, ISO 868, ISO 7619-1 and ASTM D 2240
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Checkline Durometer-Fixtures

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Checkline Durometer-Fixtures
Checkline Durometer-Fixtures
  • Custom fixtures are available for your specific application
  • Manufacturer: Checkline
  • Warranty: One Year
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Custom Durometers

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Custom Durometers
Custom Durometers
  • Type OO-R Durometer
  • Type RR Durometer
  • Type GO Durometer
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Shore Durometer Selection Guide

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Shore Durometer Selection Guide
Shore Durometer Selection Guide
  • Choose the ideal durometer for your application
  • Manufacturer: Checkline
  • Warranty: One Year
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Checkline Durometer Technical Information

Discontinued Product
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Checkline Durometer Technical Information
Checkline Durometer Technical Information
  • Rubber & Plastic Hardness Tester
  • Unique flexible coupling system automatically aligns the presser foot to the surface of sample
  • Manufacturer: Checkline
  • Warranty: One Year
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