NIST-Traceable Calibration Services for Electrical, Mechanical, Electromechanical, and Electronic Measuring Instruments in Towson, MD

Electrical Test Instruments, LLC (ETI) is a leader in the calibration, repair, and manufacturing of electrical test equipment. We specialize in NIST-traceable calibration services for a variety of electrical test equipment and mechanical measuring instruments, including meghommeters, multimeters, clamps, torque wrenches, DLRO’s, circuit breaker testers, power factor test sets, recloser test sets, power supplies, power analyzers, and everything in between.

ETI provides both onsite calibration services at our Towson customers’ facilities as well as in-house service at our calibration laboratory. Our onsite calibration customers enjoy same-day turnaround of their test equipment at their own facilities with minimal downtime. Our in-house calibration service provides fast industry-leading turnaround times of five to eight business days, with an expedite service available to turn your equipment around within three days. ETI is ISO 9001:2015 accredited, ANSI/NCSL Z540 compliant, and 10 CFR Part 50 Appendix B compliant, making us the clear choice for electrical testing businesses, municipalities, data centers, nuclear energy facilities, utilities, universities, Fortune 500 companies, and electrical contractors of all shapes and sizes.

We also manufacture circuit breaker testing equipment. Our primary injection circuit breaker test sets range from 250A to 6,000A continuous output, with capabilities for instantaneous testing up to 60,000A. ETI’s power supplies are ideal for circuit breaker charging motor testing. We are also the United States reseller and service center for Metrel products, including DLRO’s and meghommeters, making ETI a one-stop shop for your electrical testing needs.

Finally, our capabilities include high-quality repair services that can extend the life of your critical test equipment. ETI can help you solve your most complex and urgent test equipment challenges.

Just some of the products and services we offer our Towson customers:

  • Portable Circuit Breaker Tester
  • Adjustable Test Stab System
  • Torque Calibration
  • Test Equipment Calibration Services
  • Electrical Meter Calibration
  • Circuit Breaker Tester Calibration
  • PEARL Calibration
  • Acceptance Testing Calibration
  • Digital Multimeter Calibration
  • Oscilloscope Calibration
  • Electric Meter Calibration
  • Test Equipment Calibration
  • Portable Current Power Supply
  • Meter Calibration Services
  • Clamp Calibration
  • Multimeter Calibration
  • AC-DC Variable Power Supply
  • Portable Circuit Breaker Test Set
  • Test Equipment Repair
  • Mechanical Instrument Calibration
  • Pressure Calibration
  • Mobile Circuit Breaker Test Set
  • Electrical Calibration Services
  • NETA Calibration
  • High Current Digital Ammetter Retrofit
  • Electric Equipment Repair
  • Electronic Test Equipment Calibration Services
  • Circuit Breaker Test Set Calibration


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We Support Towson Facilities with NIST-Traceable Electrical Test Equipment Calibration Services

ETI specializes in NIST-traceable calibration services for various types of electrical test equipment, including power factor test sets, recloser test sets, circuit breaker testers, meghommeters, electrical clamps, multimeters, power supplies, DLRO’s, power analyzers, oscilloscopes, and everything in between. We present both onsite calibration support services at our customers’ locations in Towson, Maryland and also in-house service at our calibration lab. Our on-site calibration customers in Towson enjoy same-day turnaround of their test equipment over at their own facilities with very little downtime. Our in-house calibration assistance delivers fast industry-leading turnaround times of 5 to 8 business days, with an expedite service available to restore your company’s equipment to Towson as soon as possible. ETI is an ISO 9001:2015-accredited calibration lab that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Universities, electrical contractors, electrical testing businesses, municipalities, utilities, data centers, Fortune 500 companies, and nuclear energy facilities of many shapes and sizes in Towson, Maryland depend on ETI to manage their electrical test equipment calibration programs.

ETI is a Well Known Provider of NIST-Traceable Calibration Services for Mechanical Instruments in Towson, MD

ETI’s NIST-traceable calibrations of mechanical measuring and test equipment are trusted by testing businesses throughout the U.S. The instruments we service include temperature meters, oil pressure meters, infrared inspection equipment, air pressure meters, calipers, stop watches, IR cameras, torque wrenches, pressure controllers, micrometers, tachometers, and virtually anything in between. Our experts are skilled in the calibration of mechanical equipment at our customers’ locations in Towson, MD. Our team also offers a mail-in choice to service your critical mechanical test equipment at our in-house calibration lab. Calibration services in Towson is an economical and convenient option for nearby companies who prefer to minimize their down time. Our mail-in option also offers fast turn-around times of five to eight business days, ensuring our customers in Towson get their critical equipment serviced promptly. ETI is an ISO 9001:2015-accredited calibration laboratory that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Acceptance testing businesses, nuclear energy facilities, municipalities, data centers, electrical contractors, universities, utilities, and Fortune 500 companies of various sizes in Towson, Maryland count on ETI to oversee their mechanical test and measuring instrument calibration programs.

Extending the Life of Critical Test Instruments in Towson, MD with our Repair Services

ETI repairs all of the major brand names and models of electrical testing instruments. Whether your Towson facility’s instruments have been in operation for many years or are brand new, our vast repair capabilities are able to prolong the lifespan of your essential testing equipment. ETI’s customer services include lab instruments, panel meters, multimeters, power quality meters, switchboard meters, analog instruments, clamp-on meters, oscilloscopes, power analyzers, frequency counters, digital instruments, and a wide variety of additional mechanical and electrical test equipment. All of our repairs feature NIST-traceable calibration of your instruments, comprehensive documentation, competitive pricing, and a swift turnaround. Towson facilities count on ETI to minimize their downtime and repair their critical test instruments.

We Manufacture Top Quality Circuit Breaker Testers and Power Supplies for Customers Around the Nation

ETI makes and sells trusted electrical test equipment. Our Professionals provide services for circuit breaker testing instruments, including circuit breaker test sets and power supplies. In addition, we are the U.S. reseller and service center for the complete line of Metrel electrical test instruments and products.

Our product line of top quality low voltage high current circuit breaker test sets serve the whole spectrum of electrical testing companies’ needs. Our primary injection circuit breaker testers range from 250A to 6,000 A continuous output, with instantaneous testing capabilities up to 60,000 A. Our PI-250B, PI-800, and PI-1600 test sets are portable, lightweight, durable, and modular whilst outperforming competing products’ capabilities at their price points. Our stationary PI-2500, PI-4000B, PI-5000, and PI-6000 circuit breaker test sets also lead the market in capabilities and reliability for high current circuit breaker testing. All ETI circuit breaker testers include our state-of-the-art MAC-21 controller, which is a self-contained microprocessor-based metering and control package for primary injection testing. In addition, we retrofit other manufacturers’ circuit breaker test sets with our MAC-21 controller:

  • extending their useful lives,
  • expanding their capabilities,
  • and revamping the circuit breaker testing capabilities of our valued customers.

ETI’s premium power supplies are lightweight, sturdy, and reliable. Our products are capable of outputting 7.2 A to 20A continuous at 140 VAC. ETI’s power supplies are ideal for circuit breaker charging motor testing.

As the U.S. reseller and authorized service center for Metrel products, ETI is undeniably a one-stop shop for electrical testing companies’ instrument requirements. We support and sell the entire line of Metrel offerings, which include DLRO’s, meghommeters, and power analyzers. Our annual repair services and calibration programs on all products we make and sell make ETI the trusted partner of hundreds of electrical testing companies, universities, data centers, Fortune 500 companies, utilities, and municipalities nationwide.

About Towson, MD

Towson is located in Baltimore County, Maryland. It was first settled in 1752 when Pennsylvania brothers, William and Thomas Towson, began farming an area of Sater’s Hill, northeast of the present-day York and Joppa Roads. It has an estimated population of 55,197 and median household income of $81,931. The unemployment rate in Towson is 4.8% (U.S. avg. is 5.2%) and median home cost is $345,000. You can enjoy musical entertainment by visiting Towson’s Recher Theatre located right in the heart of Towson. Also Hampton National Historic Site lets you step into the past. It is a stunning Georgian mansion that was completed in 1790 and is filled with period pieces.

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Electrical Test Instruments supports customers in Towson, Maryland, including the following zip codes: 21022, 21139, 21204, 21209, 21210, 21212, 21239, 21252, 21285, 21286. Click here to return to our MD service area page.