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Klein Tools CL390 Digital Clamp Meter Review

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By Best Choice team
Checked icon Last updated - March 31, 2026
9.6

Verdict overview

  • worth the money 9.8
  • Simple to use 9.3
  • Precision 9.8
  • clearly written 9.6
Pros
  • Versatile for AC/DC current measurement.
  • High-visibility LCD for easy reading.
  • Auto-ranging ensures accurate results.
Cons
  • Low visibility in sunlight.

Tech specs

product dimensions8.45 x 3.51 x 1.51 inches 8.32 ounces
batteries3 AA batteries required. included

Product Overview

I recently had the opportunity to test Klein Tools CL390 Digital Clamp Meter and I have to say that it is a fantastic product. It is a great tool for anyone who needs to measure AC/DC current, NCVT, AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test and continuity via test leads. It is also great for measuring temperature with a thermocouple.

The first thing I noticed was how easy it was to use. The clamp meter has an intuitive design that makes it easy to understand and use even for novice users. The LCD display is high visibility reverse contrast which allows you to easily see the readings in any lighting condition. I found this extremely useful because sometimes you can t always be in good light when taking readings.

The clamp meter also has a non contact voltage tester integrated into the clamp jaw which is great for detecting live wires without having to make contact with them. This feature makes it much safer to work with electricity as you don t need to come in contact with live wires in order to detect them.

The accuracy of the CL390 Digital Clamp Meter is also excellent. It uses True Root Mean Squared TRMS measurement technology which ensures accurate readings every time. This technology also helps reduce errors due to temperature fluctuations or interference from other electrical signals which can be common issues with other meters.

I found the versatility of the product another great advantage of the CL390 Digital Clamp Meter as it can be used in various different scenarios such as checking wiring faults or testing appliances for electrical safety issues. It also has an integrated test lead holder on the side of the clamp and an optional magnetic hanger for hands free operation which makes using it even easier when you are working in tight spaces or difficult areas.

Overall I would highly recommend Klein Tools CL390 Digital Clamp Meter for anyone who needs an accurate and reliable tool for measuring AC/DC current and voltage as well as other electrical properties such as resistance and capacitance. With its intuitive design and high accuracy rating, this product will serve any user well and make their job easier.

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Frequently asked questions

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The secret behind our reviews

By Best Choice team

Best Choice Team is your go-to source for curated product recommendations across various categories. Leveraging years of industry experience and advanced AI technology, we analyze data from multiple sources to bring you the most relevant and up-to-date product lists.

Our AI-driven approach allows us to streamline the selection process, ensuring that the products we feature align with current market trends and consumer preferences. We aim to provide content that helps you navigate your purchasing decisions with greater ease.

Users reviews

96% of reviewers would recommend to a friend, Based on 2,542 Reviews

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