Electrical Test Instruments, LLC is a leader in the calibration and repair of electrical test equipment and electro-mechanical measuring instruments. ETI also manufactures high-current circuit breaker test sets and other electrical test equipment.

We specialize in nationwide onsite calibration services. ETI offers NIST-traceable calibration and certification onsite at your facility or at our calibration laboratory in Maryland. We service virtually all types of electrical test equipment including circuit breaker testers, protective relay test sets, insulation testers, high voltage test sets, low resistance ohmmeters, clamp meters, multimeters, oscilloscopes, and many others.

As a manufacturer of high-current ammeters, such as those used in our line of primary injection circuit breaker test sets, we have particular expertise in the onsite calibration and repair of a variety of circuit breaker testers.

Contact us today for a calibration or high-current circuit breaker tester quote.

Electrical Test Instruments