Your Partner in Calibration

At ETI Precision we're committed to building strong partnerships and delivering unrivaled accuracy.

31+ Years of Calibration Excellence

Electrical Test Instruments (ETI) is a leader in the calibration, repair, and sale of test and measurement equipment. Customer service sets us apart: every member of our team is committed to our customers’ success. We have been providing outstanding customer service with a relentless focus on quality since 1994.

All of our calibrations are in accordance with ISO/IEC 17025:2017, ANSI/NCSL Z540-1-1994, and ISO 9001:2015. Our accreditation reflects decades of dedication to technical excellence, customer service, and compliance — giving our customers confidence in every audit, inspection, and operation.

View Our Accreditation

High Caliber Service

Our experienced technicians are available where you need them, so you’re able to perform the work you do every day without interruption or delay. We view our customers as partners, and strive to provide the highest level of service and support. Our internal culture of service carries over into all of our interactions.

Minimize Downtime

Our dedication to minimizing equipment downtime is evident in everything we do at ETI Precision. We offer simplified, onsite calibrations in all 50 states, minimizing the time your equipment is out of commission, keeping your projects on schedule and allowing you to best support your customers.

Comprehensive Solutions

Our product and service offerings work together toward the unified goal of promoting the safety and reliability of your test and measurement equipment. Our calibration services give you confidence in your measurements, our high-current circuit breaker testers and power supplies are built to last, and our instrument repair and breaker tester retrofit services extend the life of your critical equipment.

Accessible and Adaptable

When it comes to our products and services, we don’t overcomplicate them. Technicians find our products easy to use and our team is available to support you whether you use our products or not. Our focus is straightforward – deliver high performance, accuracy, and durability to our partners through our products and services.

Specializing in Nationwide On-Site Service

We come to you, minimizing the downtime of your critical instruments by offering calibration services at your facility. As a manufacturer of circuit breaker testers and ground-fault testing equipment, we have unique expertise and proprietary technology for calibrating high-current ammeters. We offer a broad range of capabilities within electrical, torque, pressure, physical, dimensional, RF, and microwave calibration services. ETI is also able to repair and retrofit a wide variety of test and measurement instruments. Our emergency onsite repair services are available for your urgent equipment issues.

ETI Precision: Powered by Accredited Labs

Raising the Standard in Precision & Partnership

For more than three decades ETI Precision has been a trusted name in calibration across all 50 states — 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 ETI Precision 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 ETI Precision 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.

Our company has worked with ETI for over twenty years, during this time we have found them to be a reliable source of calibration and repair services as well as a supplier for some of our test equipment. ETI routinely services over 1,500 assets at 10+ locations.

Schneider Electric

Potomac Testing has been using ETI for over 25 years. We rely on them for all of our calibrations and repairs, ensuring our equipment is maintained properly and compliant with NETA and PEARL requirements. ETI provides our team with the best customer service available.

Potomac Testing

ETI consistently provides great service, from turning our equipment around in a timely fashion to troubleshooting with our technicians over the phone so we can avoid repairs altogether. They are a great partner in the industry.

Protec Equipment Resources

Electric Power Systems has trusted ETI with our annual calibration program at over 30 facilities nationwide for more than two decades. The team at ETI provides excellent customer service, working closely with our local teams to manage onsite service schedules.

Electric Power Systems

ETI is highly responsive to our requests for support, all it takes is a short email and we’re quickly talking to an engineer who knows the product and our applications inside and out. ETI products are intuitive and robust, and their technical team is ready to help make each client successful.

A-Rent