Your Partner in Calibration

At Tru Cal International we're committed to building strong partnerships and delivering unrivaled precision.

33+ Years of Calibration Excellence


Serving as an asset to countless businesses in a variety of industries, Tru Cal International has specialized in test equipment calibration since 1992. We also specialize in the retail of refurbished electronic test equipment. Experts in the industry, we cater to your electronic test equipment needs ideally.

Tru Cal International is based on the vision to raise the industry standards of quality by providing the best calibration solutions. Our services are authentic with our calibration laboratory being accredited to ISO/IEC 17025:2017. We guarantee quality, accuracy, and reliability to our clients, so you needn’t look any further than Tru Cal International.

Our facility is a laboratory tested and regulated by industry standards because we never settle for less than top quality services and results. All calibration resources are state of the art, guaranteeing authentic laboratory testing applications and reliable results.

The people who stand behind Tru Cal have years of experience in test equipment calibration and have extensive knowledge about the equipment and the industries they serve. This enables us to provide the best service to clients, helping them understand our service and what it can provide for them. Anytime you need assistance, we’re here to help.

View Our Accreditation

Tru Cal International: Powered by Accredited Labs


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Raising the Standard in Precision & Partnership


For more than three decades Tru Cal International has been a trusted name in precision calibration across Illinois, Wisconsin and Indiana — known for our commitment to accuracy, reliability, and personal service.

Now, as part of the Accredited Labs family, we’re elevating that legacy even further by combining our local expertise with the capabilities of a nationally recognized group of ISO/IEC 17025-accredited labs.

What This Means for You

  • Local Service, National Strength: You’ll continue receiving the responsive, hands-on service Tru Cal is known for — now backed by the scale and support of a nationwide accredited calibration network.
  • Expanded Capabilities: Gain access to a wider range of metrology services, advanced technology, and enhanced compliance solutions tailored to your industry.
  • Transparent Pricing & Reliable Turnaround: Get straightforward quotes, flexible scheduling, and consistent service that helps reduce downtime and eliminate guesswork.
  • Confidence in Every Audit: From routine calibrations to high-stakes compliance, we make it easier to stay audit-ready and fully documented.

The Tru Cal International Commitment, Reinforced

As part of Accredited Labs, we’re delivering even greater precision, broader capabilities, and the same dedication to service you’ve counted on for decades.

Welcome to the next generation of calibration — where local trust meets national excellence.

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