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Tool News: Klein Tools RT390 – The Ultimate Circuit Analyzer for Homeowners and Professionals

Klein Tools RT390


Klein Tools has recently launched a new circuit analyzer model RT390. It is an advanced device that performs a wide range of electrical tests to analyze the wiring conditions at an electrical outlet.

The Circuit Analyzer features a large color LCD that displays easy-to-understand results for wiring faults, AFCI, GFCI, voltage drops, and time to trip devices. It can detect and identify common wiring faults in standard, AFCI, and GFCI electrical outlets, including dual (open neutral/open ground) wiring faults. Moreover, the device inspects AFCI and GFCI devices and includes trip time and trip current measurements.

One of the most notable features of the Circuit Analyzer is its ability to perform 12A, 15A, and 20A load testing to measure the percentage voltage drops. The results are displayed on the device’s large, color LCD, making it easy for professionals to analyze the readings.



The Klein Tools RT390 Circuit Analyzer is designed for use with North American 120V AC 3-wire electrical outlets, making it a versatile device for electricians, maintenance personnel, and DIY enthusiasts. The device is also equipped with safety features such as automatic power-off after 5 minutes of inactivity to conserve battery life.

The Circuit Analyzer comes with a detachable cord for easy storage and is made of high-quality materials, including ABS plastic, over-mold, and electronic components. It also includes 3 AAA alkaline batteries, instructions, and a pouch, making it an ideal tool for electrical professionals on-the-go.

The Klein Tools RT390 Circuit Analyzer is a comprehensive solution for electrical testing, offering a wide range of features for analyzing the wiring conditions at an electrical outlet. Its large, color LCD, safety features, and load testing capabilities make it a valuable tool for professionals who require precision and accuracy in their work.


The Klein Tool RT390 Circuit Analyzer is available at the following retailers:
Acme Tools
Home Depot


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