Audit-Ready and
In Control

Providing reliable and cost-effective accredited calibration to North Carolina and across the nation since 1996.

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ISO/IEC 17025 Accredited

At Polymer Testing Instruments, our goal is to keep our clients in compliance by ensuring accurate and timely calibration services, and continuously meeting and exceeding expectations when it comes to the management and calibration of our client’s assets.

We take calibration seriously—that’s why we're ISO/IEC 17025 accredited. This accreditation demonstrates our commitment to precision measurement, rigorous quality control, and industry-leading expertise. 

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Our Calibration Services


Polymer Testing Instruments Inc. was established in 1996 to provide a high-quality alternative for service and calibration of equipment for the Rubber & Plastics industry. We also provide calibration and service to a wide variety of customers covering Aerospace and Defense, Automotive, Chemical Manufacturing, Energy, Engineering and R&D, Manufacturing and the Medical and Healthcare industries.

PTI performs ISO/IEC 17025 Accredited (A2LA Certificate #1504.01) calibrations and repairs both at your facility and in our laboratory. With over 30 years’ experience, our engineers and technicians pride themselves in supplying the reliable services and products you demand. 

Tools & Equipment We Service


  • Laboratory Cutting dies
  • Dial Indicators
  • Electronic Indicators
  • Calipers
  • Micrometers 
  • Thermocouple Indicators
  • RTD Indicators
  • Tensile Testers
  • Rubber Harness
  • Rheometers, Moving Die
  • Rheometer, Oscillating Disk
  • Advanced Rheometry
  • Mooney Viscometers
  • Force Gauges
  • Pressure Devices
  • Rotational Speed
  • Scales and Balances
  • Ovens
  • Oil Baths
  • Chambers
  • Freezers


Don't see your equipment listed here? Contact us for a custom quote.

Learn More About Our Calibration Services

Why Choose PTI?

At Polymer Testing Instruments we combine the personalized service of a local provider with the resources and reliability of a national network. 

Powered By Accredited Labs

As part of the Accredited Labs family, we bring you industry-leading calibration services backed by ISO/IEC 17025 accreditation, advanced technology, and a commitment to precision.

Customer-Centered Service

We prioritize clear communication, consistency, and reliability—ensuring your equipment is calibrated accurately, on time, and with minimal disruption to your operations.

Tailored Solutions for Your Industry

Our expert team takes the time to understand your unique calibration needs, providing customized support to keep you compliant and performing at your best.

Industries We Serve

Audit-Ready Calibration in 3 Simple Steps
1

Submit Your Equipment List

Send us a list of the equipment you need calibrated, and we’ll provide a tailored quote with clear pricing—no hidden fees.
2

Schedule Your Calibration

Choose a convenient time for an in-lab or on-site equipment calibration. Our certified technicians ensure precision and compliance with ISO/IEC 17025 standards.
3

Stay Compliant & Audit-Ready

Receive detailed calibration reports and certification, giving you peace of mind for audits and operational excellence.