Durometer Calibration Services

Durometer calibration matters because an uncalibrated instrument produces inaccurate Shore hardness readings that can mask material defects, leading to rejected parts, product failures, and non-conformance findings during an audit. Standardized Shore hardness scales and test methods govern how durometer readings are measured, and a durometer operating outside its verified accuracy range cannot confirm that a rubber, elastomer, or plastic part meets its specified hardness requirement.

ANSI/NCSL Z540.3 establishes the calibration program requirements that quality systems depend on to demonstrate measuring and test equipment is fit for use, giving quality managers the documented audit trail their ISO/IEC 17025:2017 and customer audits require. Materials engineers and lab technicians need confidence that indentation readings reflect the true hardness of the material tested, not drift in the durometer’s spring force or indenter.

Micro Precision’s calibration program applies standardized test methods and ANSI/NCSL Z540.3 program discipline to every Shore A, Shore D, and Shore OO durometer it services, giving rubber and plastics manufacturing, automotive, medical device, and footwear quality programs a calibration record they can trust.

Ensuring accurate durometer calibration means verifying the instrument’s indentation reading against certified reference test blocks traceable to NIST across the applicable Shore scale, then documenting the results on a certificate of calibration. Micro Precision follows a defined sequence for every durometer received: inspect the instrument and indenter condition, apply certified test blocks across the applicable Shore A, Shore D, or Shore OO range, measure and record as-found and as-left results, adjust the instrument where needed, and issue documentation confirming the outcome.

Micro Precision calibrates durometers by inspecting the indenter and spring mechanism, verifying readings against NIST-traceable certified test blocks across the applicable Shore scale, recording as-found and as-left data, making adjustments where required, and issuing a certificate of calibration for every instrument.

Every durometer returns with a certificate of calibration documenting the verification performed and the standards referenced. Micro Precision offers standard turnaround alongside faster and quick turnaround options for durometers on a tight production or audit schedule, without compromising the verification steps required to maintain accredited calibration.

Micro Precision offers durometer calibration through both in-lab and on-site service, giving quality managers and procurement officers a choice based on instrument type, production schedule, and downtime tolerance. In-lab calibration ships the durometer to one of Micro Precision’s ISO/IEC 17025:2017 accredited labs for full calibration under controlled conditions using certified reference test blocks.

On-site calibration brings a Micro Precision technician directly to the facility, verifying benchtop durometer test stands and portable handheld durometers without removing equipment from the production floor. On-site service is especially useful for facilities managing a variety of durometers across multiple production lines or quality control stations.

Both in-lab and on-site durometer calibration are backed by NIST traceability and documented on a certificate of calibration referencing applicable industry standards. Micro Precision provides standard turnaround for both service types, with faster and quick turnaround options available for time-sensitive audit or production needs across its network of more than 50 calibration labs.

Micro Precision calibrates a variety of durometer types and scales used to measure the surface hardness of rubber, elastomers, and plastics across manufacturing and quality control environments.

• Shore A durometers, used for softer rubber, elastomers, and flexible plastics
• Shore D durometers, used for harder plastics and rigid rubber compounds
• Shore OO durometers, used for foams, gels, and very soft elastomeric materials
• Portable and handheld durometers, used for spot checks on production floors and in the field
• Benchtop durometer test stands, used for repeatable, high-volume laboratory testing
• Digital durometers, including models from ZwickRoell and Asker
• Dial (analog) durometers, including models from Rex Gauge, PTC Instruments, and Fowler
• Durometer test blocks and reference standards used to verify durometer accuracy

Durometer models not listed here are likely supported as well. Contact Micro Precision to confirm calibration availability for a specific make and model. Durometers measure the hardness of rubber, elastomers, and plastics using Shore scales, a distinct measurement discipline from hardness tester calibration services, which covers Rockwell, Brinell, Vickers, and Leeb testers used on metals. Durometer calibration is available as part of Micro Precision’s broader mechanical and dimensional calibration capabilities.

Micro Precision delivers ISO/IEC 17025:2017 accredited, NIST-traceable durometer calibration services for Shore A, Shore D, and Shore OO durometers, distinct from its dedicated hardness tester calibration program for metal testing equipment. Backed by a network of more than 50 calibration labs, quality managers get audit-ready documentation, materials engineers get trustworthy hardness data, and procurement officers get a single certified vendor for an entire durometer inventory. Request a calibration quote today and put a definitive standard behind your Shore hardness testing program.

Please complete our quick Durometer calibration & repair service request form, and a Micro Precision representative will reach out to you same-day during office hours, or within one business day after office hours. (Mon – Friday 8AM – 4PM PST)