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PTC® Durometer Styles & Types

306L Classic Style408 Durometer502D Durometer511A Digital Durometer201A Pencil DurometerDigital Pencil Durometer      Shore Hardness

Classic Style      Ergo Style       e2000        e2000 Digital     Pencil       Pencil Digital

PTC® Instruments manufactures durometers to meet or exceed ASTM D2240 and offers A2LA accredited calibration services to ISO/IEC 17025 ANSI/NCSL, Z540-1.

Our sales department will help you determine the correct durometer for your application. We offer material testing to determine the correct durometer type and style for your application at no charge.

All Calibration Standards are traceable to the National Institute of Standards and Technology (NIST). Durometer calibration services and reports are provided by PTC Metrology™ and will meet your ISO, ANSI, MIL, DoD, EuroNorm and other international standards including DIN 53505, ISO 868 and ISO 7619.


 Made in the USA  Durometer Calibration & Repair

If you need to return an instrument for calibration and/or repair, please fill out our Return Authorization Form. One of our specialists will email you an RMA number and instructions to send in your unit. Turn around time is usually 3 to 5 days from the date it arrives at PTC® Instruments / PTC Metrology™

(See below for durometer styles and types)
  • Shore A Scale Durometers
    Measure the hardness of EPDM rubber, neoprene, nitriles, polyurethane, printing rollers, silicone rubber, white PVC, thermoplastic elastomers, flexible polyacrylics, wax, felt and leather.
  • Shore D Scale Durometers
    Measure the hardness of acrylic, epoxy, fiberglass, hard rubber, vinyl, cellulose acetate, and other similar materials. ASTM D2240
  • O Scale Durometers
    Measure the hardness of soft printing rollers, nylon, rayon, orlon, artgume, and textile windings.
  • AO Scale Durometer
    This instrument measures the indentation hardness of vulcanized or thermoplastic rubber in low hardness range and cellular rubbers.
  • B Scale Durometers
    Measure the hardness of skate wheels, printing platen, rubber, thermoplastic, and elastomers.
  • C Scale Durometers
    Measure the Hardness of Medium Hard Rubber, Elastomers, and Thermoplastics.
  • DO Scale Durometers
    Measure the hardness of fireproof coatings, slasher beams, Pyrocrete®, and dense textile winding.
  • E Scale Durometers
    E Scale Durometers test the hardness of Medium Density Textile Windings, Soft Rubber, Foamed Elastomers, Wound Threads, Yarn Packages.
  • Type M Durometers with Stand
    This system is designed specifically for measuring small cross section O-rings and thin pieces of rubber (not less than 1.25mm thick).
  • Digital Durometers
    All PTC® digital durometers include an A2LA/NIST Traceable Calibration Certificate to ISO 17025 from PTC Metrology™
  • Asker C Scale Durometers
    Measure Hardness of Soft Rubber, Sponge, Plastic Foam, Elastomers and similar materials. Asker C Durometers meet both JIS K7312 and SRIS 0101.
  • Asker F Scale Durometers
    Measures the Hardness of Foam Rubber, Urethane Foam and Plastic Foams
  • Drywall Durometer Drywall Durometer
    Model 414 USG Durometer designed for drywall manufacturers in process control.
  • Foam & Sponge Rubber Durometer Foam & Sponge Rubber Durometer
    Model 302SL Durometer Measures the Hardness of soft materials such as foam rubber, sponge rubber, cellular material and gel-like materials.
  • Specific Application Durometers Specific Application Durometers
    PTC® manufactures durometers for specific applications such as Racing Tire Durometer, Composite Foam, Drywall, Foam & Sponge Rubber, Crab & Lobster Shells and Renfro Durometer.