best clamp meter

Best Clamp Meter: Our Top 6 Picks of 2021 Reviewed

Last updated on June 27th, 2021 at 10:50 pm.

Are you looking for a good clamp meter?

The best clamp meters have a long battery life, a high safety rating, and will quickly measure voltage and current.

The downside is that there are also poorly made ones that fault constantly, runs out of power quickly, or give you the wrong readings — not fun!

Conversely, a low-quality clamp meter will constantly fault, run out of battery, and can even show you the wrong readings. Not fun.

So to help you separate the good from the junk—we’ve reviewed the Top 6 Clamp Meters of 2021

Let’s dive straight into the reviews.

Preview Product Key Features
Fluke 323 True-RMS Clamp Meter Fluke 323 True-RMS Clamp Meter
  • Digital clamp meter measures AC current to 400 amp, AC and DC voltage to 600 v, and resistance to 4 kilo ohms. Does not measure DC current
  • The true RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Jaw opening measures current in a conductor up to 30 millimeter without touching or interrupting the circuit. Resistance accuracy: 1.0% ± 5 digits
Kyoritsu - KEW2046R 2046R True RMS Digital Clamp-Meter, 600A AC/DC, Conductors to 33mm, Voltage,... Kyoritsu - KEW2046R 2046R True RMS Digital Clamp-Meter, 600A AC/DC, Conductors to 33mm, Voltage,...
  • Digital clamp-meter measures AC and DC to 600A, AC and DC voltage to 600V, capacitance to 4,000 microfarads, frequency to 10kHz, and resistance to 60 megohms
  • True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Clamp with 33mm (1.3 inches) jaw opening measures current without touching or interrupting the circuit
Mastech MS2109A True RMS Digital AC DC Clamp Meter 600A Temp NCV RC Test Tester Mastech MS2109A True RMS Digital AC DC Clamp Meter 600A Temp NCV RC Test Tester
  • DC Voltage: 600mV/6V/60V/600V±(0.7% +2)
  • AC Voltage: 6V/60V/600V±(0.8% +3)
  • DC/AC Current: 60A/600A ±(3% +6)
Milwaukee 2235-20 400 Amp Clamp Meter Milwaukee 2235-20 400 Amp Clamp Meter
  • The product is easy to use
  • The product is durable
  • The product is manufactured in Taiwan
Hioki HiTester 3283 True RMS Clamp-Meter, 10mA to 200A AC Leakage Current, Conductors to 40mm,... Hioki HiTester 3283 True RMS Clamp-Meter, 10mA to 200A AC Leakage Current, Conductors to 40mm,...
  • Digital clamp-meter measures leakage AC from 10mA to 200A and frequency to 1,000Hz
  • True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Clamp with 40mm (1.57 inches) jaw opening measures current without touching or interrupting the circuit
Klein Tools CL380 Electrical Tester, Digital Clamp Meter and Non-Contact Voltage Tester,... Klein Tools CL380 Electrical Tester, Digital Clamp Meter and Non-Contact Voltage Tester,...
  • Electrical Tester measures both AC/DC current via the clamp
  • Non-contact voltage tester integrated into the clamp jaw
  • High-visibility reverse contrast LCD display for improved viewability in all ambient lighting conditions

Top 6 Best Clamp Meter

Fluke Clamp Meter

Sale
Fluke 323 True-RMS Clamp Meter
  • Digital clamp meter measures AC current to 400 amp, AC and DC voltage to 600 v, and resistance to 4 kilo ohms. Does not measure DC current
  • The true RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Jaw opening measures current in a conductor up to 30 millimeter without touching or interrupting the circuit. Resistance accuracy: 1.0% ± 5 digits

The Fluke 323 clamp meter is one of the most modern and safe options on this list. It can measure both AC current up to 400 Amps, as well as voltage levels up to 600V.

The unit also meets CAT IV safety standards for use in hazardous environments with 300 volts or less; it’s a great option if you work around high-voltage equipment often!

The true RMS readings are accurate and stable so that your measurements will come out just right every time – whether measuring DC currents from 1 Amp all the way up to 4000 amps, resistance values between 0 Ω and 4 kΩ (or kilohms), or anything else imaginable!

The Clamp Meter is a great tool for anyone who needs to measure current without interrupting the flow of electricity. With up to 30mm clearance, it’s perfect for those times when you don’t have any room and need measurements from farther away!

This clamp meter also features a slim design that makes this device easy enough to slide into your pocket while not in use so that it doesn’t get in the way or take up space on workbenches.

For those of you who like to troubleshoot circuit issues, the Fluke clamp meter has a “continuity sensor” that will beep when it detects electricity up to 70 Ohms.

One downside we found with this product is that the ports are located on the bottom and can put a strain on plugs while also making propping it up difficult.

If you’re sick of your old, under-performing clamp meter that can’t measure voltage or current anymore and need to pick up a new one for use on the job site, we’ve got just what you need.

The Fluke 323 is an excellent option at this price range with features like high accuracy in precision measurement as well as easy accessibility because it’s not too heavy!

CHECK PRICE
Advantages
  • 600 V AC and DC voltage measurement
  • CAT IV 300V/CAT III 600 V safety rating
  • Measures resistance up to 4 kΩ
  • True RMS AC voltage & current readings
  • Great size and ergonomics
Disadvantages
  • Ports are in odd positions

Kyoritsu Clamp Meter

Kyoritsu - KEW2046R 2046R True RMS Digital Clamp-Meter, 600A AC/DC, Conductors to 33mm, Voltage,...
  • Digital clamp-meter measures AC and DC to 600A, AC and DC voltage to 600V, capacitance to 4,000 microfarads, frequency to 10kHz, and resistance to 60 megohms
  • True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Clamp with 33mm (1.3 inches) jaw opening measures current without touching or interrupting the circuit

For customers who are willing to spend a little more, the Kyoritsu clamp meter is one of the best on the market. With true RMS sensing and jaw opening that opens 33mm wider than our previous model from Fluke, it’s sure to be an excellent buy for those looking for accuracy in their readings without fluctuations.

The Kyoritsu can measure AC up to 600 Amps as well as DC from 100-600V with an input sensitivity capable of reading amps or volts at any given time – making this product perfect not just for electricians but also engineers!

The Kyoritsu clamp meter can measure capacitance up to 4000 microfarads, resistance of 60 megohms and frequencies as high as 10kHz. This model also has a CAT IV safety rating for installations from 600V upwards.

The Kyoritsu clamp meter runs on AAA batteries meaning you don’t need an electrical outlet nearby to power it off when not in use – this is perfect if forgetting about its battery life (maybe because the device costs more than most?).

One downside though: The price point – at a slightly higher cost compared to competitors due mainly due to their premium product status and quality engineering that goes into each one.

The Kyoritsu clamp meter is an absolute must-have for electricians that need a long-lasting device with the ability to measure all kinds of electrical measurements. Not only are they durable, but this high price also pays off in terms of durability and versatility.

CHECK PRICE
Advantages
  • Peak hold function
  • Meets IEC safety standards 61010-1, 61010-031, & 61010-2-032, and is rated for CAT IV up to 600V
  • Impressive build quality
  • Higher maximum readings than competing models
  • Auto power-off feature
Disadvantages
  • More expensive than competitors

Mastech Clamp Meter

Mastech MS2109A True RMS Digital AC DC Clamp Meter 600A Temp NCV RC Test Tester
  • DC Voltage: 600mV/6V/60V/600V±(0.7% +2)
  • AC Voltage: 6V/60V/600V±(0.8% +3)
  • DC/AC Current: 60A/600A ±(3% +6)

The Mastech MS2109A True RMS Digital Clamp Meter is a budget-friendly, high-quality clamp meter that will make your next project much more successful. When you’re on the hunt for an affordable and reliable tool to measure AC/DC voltage current resistance, this model might be right up your alley!

This reliable meter is perfect for anyone who works in a busy environment, and needs something that will last them long. I know the jaws on this model don’t extend to as wide of an opening as some high-end models, but it’s enough space for most any conductor you’ll need to measure!

This model is also well-equipped for working in the dark, as it features a compact work light that will let you see in the dark and its display is backlit. So that you can keep track of this device’s power consumption, it features a low battery indicator and an auto shut down feature.

If being on the cheaper side has given your wallet some relief then look no further than Mastech clamp meter which boasts many awesome features but may be slower at reading once compared to pricier models we have gone over so far nonetheless with all these said if looking for something cheap yet still reliable I would recommend checking out what Mastech offers.

CHECK PRICE
Advantages
  • Built-in Non-Contact Voltage Detector
  • Low battery indicator.Auto power-off
  • Diode check and continuity test
  • Worklight and backlit display
  • Excellent value for the money
Disadvantages
  • Slow readings

Milwaukee Clamp Meter

Milwaukee 2235-20 400 Amp Clamp Meter
  • The product is easy to use
  • The product is durable
  • The product is manufactured in Taiwan

The Milwaukee clamp meter is a perfect choice for your first clamp. It combines easy of use with increased durability, which means you’ll be able to rely on it for many years without worrying about needing another one anytime soon.

You can measure the voltage across both AC and DC up to 600V and amperage at 400 amps (though resistance only goes up to 4000 ohms).

To ensure that all measurements are taken as accurately as possible, this device features TRMS – there’s no need worry if light conditions change when working in dark spaces!

In addition, due its backlight feature making display viewing much easier while clamped tightly onto an object or wire. The ruggedized design of this clamp meter also helps minimize damage in case you drop it while on the job.

However, there are a few downsides that held this model back from being #1 overall including its inability to measure DC amps and lack of auto-calibration capabilities. Though these features might be seen as drawbacks by some contractors; for someone looking for more basic measuring tools they’re perfect!

CHECK PRICE

Advantages
  • User friendly
  • Backlit display
  • Equipped with TRMS
Disadvantages
  • No auto-calibration
  • Can’t measure Direct Current

Hioki Clamp Meter

Sale
Hioki HiTester 3283 True RMS Clamp-Meter, 10mA to 200A AC Leakage Current, Conductors to 40mm,...
  • Digital clamp-meter measures leakage AC from 10mA to 200A and frequency to 1,000Hz
  • True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform
  • Clamp with 40mm (1.57 inches) jaw opening measures current without touching or interrupting the circuit

When it comes to clamp meters, you can’t get more professional than the Hioki. This device is perfect for electricians who need a tool that’s specialized in AC leakage and capable of measuring frequencies up to 1000Hz!

It has an output ranging from 10mA-200A on any conductor with voltage less or equal to 600V, which means there’ll be no surprises when using this meter at home or work.

Hioki has created a clamp meter with many features to ensure accuracy. It provides you the option of using it for linear or non-linear loads, and also comes equipped with an easy to read display screen that can be rotated 360 degrees if needed. But don’t let its versatility fool you!

This is one smart device capable of measuring everything from leaks in your home plumbing system all the way up 40 inches on cables outside electrical devices at high voltage level power transmissions lines which may not even have been designed yet but are sure to come soon.

In addition, this HiTester 3283 rechargeable battery will last more than 2 weeks without charging so there won’t any interruptions during use .

CHECK PRICE
Advantages
  • Built tough
  • Outstanding accuracy
  • Long lasting battery life
Disadvantages
  • Very expensive

Klein Clamp Meter

Klein Tools CL380 Electrical Tester, Digital Clamp Meter and Non-Contact Voltage Tester,...
  • Electrical Tester measures both AC/DC current via the clamp
  • Non-contact voltage tester integrated into the clamp jaw
  • High-visibility reverse contrast LCD display for improved viewability in all ambient lighting conditions

The Hioki clamp meter is perfect for those of you looking to get a true RMS sensing device. This nifty tool will work with both linear and non-linear loads, ensuring that your readings are as accurate as possible.

Not only this but it also features up to 40 hours of battery life so even if the rechargeable power does run out there’s no need to worry about leaving yourself stranded without any equipment!

The major issue with this model lies in its high price combined with relatively limited versatility – while it can measure leaks effectively, other measurements such like voltage or current aren’t supported by the HiTester 3283 making it less than ideal if you’re measuring anything beyond leakage detection.

To ensure that this clamp meter is as accurate as possible, the designers integrated True Root Mean Squared technology. However, it comes up short in a few key areas which is why we couldn’t rate it higher than the Fluke model.

For example, thermocouple readings are very inaccurate and feel less durable compared to other models like the Fluke 323 clamp meter for these reasons you may want to reconsider purchasing this Klein Clamp Meter since there are better options available at your disposal elsewhere on Amazon such as our top pick!

CHECK PRICE
Advantages
  • Clamp measures AC and DC current
  • TRMS technology
  • Reverse contrast LCD
Disadvantages
  • Not durable enough
  • Inaccurate thermocouple

About Thomas Hawkins

I run Electrician Apprentice Headquarters, a one-stop-shop for learning how to become a licensed electrician in the USA. I'm a licensed Master Electrician with over 20 years experience working in the Mining & Construction industries. Why do I do it? Well, because even plumbers need heroes.

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