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PTC® Durometer Styles & Types 

306L Classic Style    408 Durometer   502D Durometer   511A Digital Durometer     201A Pencil Durometer      Digital Pencil Durometer 

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.


Shore Hardness    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 specialist 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, white PVC, thermoplastic elastomers, flexible polyacrylics, wax, felt and leather.
  • Shore D Scale Durometers
    Measure the hardness of pipeline coatings, plexiglass, epoxy, vinyl, cellulose acetate, and other similar materials. ASTM D2240
  • 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.
  • O Scale Durometers
    Measure the hardness of soft printing rollers, nylon, rayon, orlon, artgume, and textile windings.
  • 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).
  • 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.