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Rex® Durometer Digital Model DD-3: Description
Rex® Digital Model DD3 Rex® Gauge Company
The Rex® DD—3 Digital Durometer is the successor to the popular Rex Model DD—1. The DD—3 is truly state—of—the—art and is the ideal instrument for lab use.
The Rex® DD—3 Digital Durometer features a new, larger direct read LCD display, RS—232C data ports for computer compatibility, a locking feature to prevent accidental erasure of tolerances, automatic shutoff and low battery warning. New accessories include MTI and SPC type printers, audio attachments and RexLab™ software.
Rex® Durometer Digital Model DD-3: Features
  1. Hi/Lo tolerance limit buttons;
  2. Hold/Reset buttons;
  3. Solid state circuitry;
  4. LCD display;
  5. Optional RexLab™ Software;
  6. Optional SPC printer;
  7. Optional Audio attachment;
  8. One year warranty;
  9. Dial rotates 270º;
  10. Rugged storage case;
  11. Certificate of calibration included.
Rex® Digital Model DD3 showing 270º Rotation
The Rex® DD—3 Digital Durometer features a rotating dial. The 270º arc allows the LCD display to be read easily ... even in the most awkward positions!
Rex® Durometer Digital Model DD-3M: Description
Rex® Digital Model DD-3M MicroHardness Tester The Rex® DD—3M Digital Durometer is designed to meet the ASTM D2240 specifications for Type M microhardness testing.
The Rex® Model DD—3M (shown at left with the ‘slim probe’ option) is mounted on the OS-3 pneumatically dampened operating stand. ASTM D2240 requires that Type M durometers be mounted in ‘Type 3’ operating stands due to the sensitivity of the instrument.
Type M durometers are designed to test materials that are too thin, irregularly shaped, or dimensionally smaller than can be accommodated by other ASTM Types.
O-rings are an excellent examples of materials for which the Type M durometer is especially well suited. The Rex® Model DD-3M is shown with the ORF-1, a fixture designed for testing various sized o-rings.
Rex® Durometer Digital Model DD-3: Specifications
Types: A, B, C, D, DO, O, OO, OOO & M
Presser Foot: 12.7 mm (0.50 inch) Ø
Dial Rotation: 270º
Display: LCD, 0—100, 00.0 Resolution
Indentor: 2.54 mm (0.100 inch) extension
Type M is 1.27 mm (0.050 inch)
Dimensions: 57 x 156 mm (2.25 x 6.125 inch)
Weight: 203 g (7.15 ounces)
List Price (A & D): Please Submit a RFQ
List Price (B, C, DO, O & OO): Please Submit a RFQ
List Price (OOO, OOO-S & M): Please Submit a RFQ
Standards: ASTM D2240, ISO 7619 & ISO 868
Information The Type ‘OOO’ is now ASTM approved, please note that there is a
distinction between ASTM D2240 Types OOO and OOO-S.
Information The Type ‘M’ requires an operating stand.

Index Terms: Rex Durometer, Rex Durometers, Shore hardness, pocket durometer, Shore scale, Shore A, Shore D, hardness, rubber hardness, plastic, plastic hardness, indentation hardness, ebonite, ebonite hardness, rubber hardness testing, rubber testing, hardness testing, durometer hardness, testing, ASTM D2240, D2240, ASTM D1957, ISO 868, ISO 7619, JIS K6253, JIS K6251, JIS K6252, JIS K 6253, JIS K6254, JIS K6255, JIS K6256, JIS K6257, JIS K6258, JIS K6259, JIS K6260, DIN 53505, DIN 53 505, CNS, K6898, BS 903, BS 2782, BS ISO 21509, BS EN ISO 868, GB/T 10807, Asker, Asker C, SRIS0101, MIL-STD-45622A, MIL-I-45208A, MIL-STD-120, 83.060, 83.080.01, hysteresis, creep, Young's Modulus.
Copyright © 2006 CCSi, Inc. • All Rights Reserved • Published August, 2006
Corporate Consulting, Service & Instruments, Incorporated
221 Beaver Street • Akron, Ohio 44304 USA
Telephone: 800.742.8535 / 330.376.3600 • Facsimile: 800.229.9329 / 330.376.8500