Rex 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.
Rex RX-MS-A-D-KIT Type A and D Durometer Kit
$1,205.00 - $1,425.00
FREE Ground Shipping
About this item
View More Details
- Rex RX-MS-A-D-KIT Type A and D Durometer Kit
- Includes a type A and type D barrel along with certified test blocks in a custom carrying case
- Conforms to ASTM D-2240
View More Details
Rex Asker Durometer
$765.00 - $1,700.00
FREE Ground Shipping
About this item
View More Details
- Conforms to Asker / JIS Specifications
- Rex Asker Durometer
- Manufacturer: Rex
- Warranty: One Year
View More Details
Rex RX-SP Slim Probe Durometer
$1,038.00 - $2,332.00
FREE Ground Shipping
About this item
View More Details
- Model: Shore D Durometer RX-1600-D
- For Plastic Hardness Measurement
- Manufacturer: Rex
- Warranty: One Year
View More Details
Rex OTK-AN Analog O-Ring Hardness Kit
$3,025.00
FREE Ground Shipping
About this item
View More Details
- Rex OTK-AN Analog O-Ring Hardness Kit
- The Analog Complete O-Ring Hardness Kit is the most convenient and accurate way to perform repeatable hardness (durometer) testing on thin materials – as thin as 0.050”.
- Manufacturer: Rex
View More Details
Rex OTK-DG Digital O-Ring Hardness Kit
$3,537.00 - $4,092.00
FREE Ground Shipping
About this item
View More Details
- Rex OTK-DG Digital O-Ring Hardness Kit
- The Digital Complete O-Ring Hardness Kit is the most convenient and accurate way to perform repeatable hardness (durometer) testing on thin materials – as thin as 0.050”.
- Manufacturer: Rex
View More Details
Rex Custom Durometers
Call for Price
About this item
View More Details
- Model Custom Durometers
- Custom durometers for your application
- Manufacturer: Rex
- Warranty: One Year
View More Details
Rex RX-1700 Dial Shore Durometer With Memory
Discontinued Product
About this item
View More Details
- Precision Dial Shore Durometer With Memory Pointer
- Available Scales: A, B, C, D, DO, O
- Conforms to ASTM D-2240
- Includes NIST Calibration Certificate
View More Details
Copyright © 2026 Abq Industrial