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10 Best Clamp Meters 2025 in the United States

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Our Top Picks

#1

Winner

Fluke 323 Clamp Meter For Commercial/Residential Electricians, Measures AC Current To 400 A,Measures AC/DC Voltage To 600 V, Resistance And Continuity, Includes 2 Year Warranty And Soft Carrying Case

The Fluke 323 Clamp Meter is an excellent choice for both commercial and residential electricians seeking a reliable tool for measuring electrical parameters. It effectively measures AC current up to 400 amps and AC/DC voltage up to 600 volts, making it versatile for various applications. One of its key strengths is the true RMS capability, which ensures accurate readings even with non-linear loads. This is particularly useful in real-world scenarios where waveforms can vary significantly. The jaw opening size, which accommodates conductors up to 30 millimeters, allows for easy measurement without the need to interrupt or touch the circuit, enhancing safety and convenience.

While the Fluke 323 is strong in many areas, it does have limitations. Notably, it does not measure DC current, which may be a drawback for users needing this function. The resistance measurement capabilities are decent, with an accuracy of 1.0% ± 5 digits, but this may not suffice for highly precise applications. The audible continuity sensor is a handy feature, but users should be aware that it may not replace detailed troubleshooting in complex electrical systems.

In terms of safety, the device meets IEC safety standards and is rated for CAT IV installations up to 300V and CAT III up to 600V, making it suitable for high-voltage environments. The lightweight design, weighing just 200 grams, enhances portability, and the included carrying case adds to the convenience. This clamp meter is ideal for electricians and technicians who need a straightforward, dependable tool for basic measurements without the bells and whistles. However, if your work frequently involves DC current measurements or requires high precision in resistance readings, you might want to explore other options.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
AC/DC Measurement
Typical excellent quality from Fluke, though it does not read high ohm values or DC current.
#2

AstroAI Digital Clamp Meter Multimeter 2000 Counts Amp Voltage Tester Auto-ranging with AC/DC Voltage, AC Current, Resistance, Capacitance, Continuity, Live Wire Test, NCV, Black

The AstroAI Digital Clamp Meter is a versatile tool designed to address both industrial and household electrical issues. It effectively measures AC current, AC/DC voltage, resistance, capacitance, diode continuity, and performs live wire tests. However, it's important to note that it does not measure DC current, which could be a limitation for some users.

The device has a large jaw opening, allowing for easy measurement of AC current without interrupting the circuit, and its compact size makes it suitable for use in tight spaces. With features like data hold, max/min readings, auto shut-off, low battery indicator, and continuity buzzer, it offers convenience and ease of use. The LCD backlit screen and built-in flashlight enhance its usability in low-light conditions.

Additionally, the non-contact voltage testing feature with sound and light alarms adds a layer of safety, making it user-friendly. The clamp meter complies with environmental pollution degree 2 and overvoltage category III 600V safety standards, ensuring it meets necessary safety requirements. While the device is battery-powered, the inclusion of two AAA batteries in the package is a thoughtful touch. In summary, the AstroAI Digital Clamp Meter is a solid choice for those needing a reliable tool for various electrical measurements. Its inability to measure DC current is a notable drawback, but its range of other features and safety ratings make it a valuable addition to any toolkit.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Additional Functions
Accurate, easy to use, and has plenty of functions.
#3

Fluke 376FC AC/DC Clamp Meter with iFlex For Industrial/Commercial Electricians, VFD Low Pass Filter For Accurate Measurements, Inrush Measurements, Bluetooth Connectivity For Remote Measurements

The Fluke 376FC AC/DC Clamp Meter is designed for industrial and commercial electricians, offering a range of features that cater to their specific needs. It measures both AC and DC currents, with a robust current measurement range, making it versatile for various electrical applications. The inclusion of the iFlex current probe allows measurements in tight spaces, thanks to its flexible design. This can be particularly useful when dealing with complicated wiring setups.

One of the standout features is the True RMS capability, which provides accurate readings even for non-linear loads, a common scenario in modern electrical systems. The inrush measurement function helps to capture the initial surge of current, which is essential for diagnosing equipment behavior.

The Bluetooth connectivity is another significant advantage, allowing electricians to connect the meter to their smartphones. This feature means they can remotely log and monitor measurements, which enhances safety by keeping them at a distance while working on live circuits. The logging capabilities also make it easier to capture intermittent faults without needing constant supervision of the meter.

However, there are some potential drawbacks to consider. While the Fluke 376FC is packed with features, it may be more complex for beginners who aren't familiar with advanced measurements or smartphone connectivity. Additionally, its size could be a concern for those seeking a more compact tool, especially if they need to carry it around frequently. Display and readability are generally good, but in bright light, some users might find it challenging to view the readings clearly. Lastly, as with many professional-grade tools, it comes at a higher price point, which might not be justifiable for occasional users or DIY enthusiasts.

The Fluke 376FC is highly suitable for professionals needing a reliable and versatile clamp meter, particularly in industrial settings. Its advanced features cater well to those who require detailed and accurate electrical measurements.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Jaw Opening Size
The iFlex probe is incredibly useful for fitting around large cables.
Additional Functions
The Bluetooth function allows remote monitoring, enhancing safety and convenience.

Buying Guide for the Best Clamp Meters

Choosing the right clamp meter can be a bit overwhelming, but understanding the key specifications can help you make an informed decision. A clamp meter is a versatile tool used to measure electrical current without having to disconnect the circuit. It's essential for electricians, technicians, and even DIY enthusiasts who need to troubleshoot electrical issues safely and efficiently. When selecting a clamp meter, consider the following key specifications to ensure it meets your needs and provides accurate readings for your specific applications.
Current Measurement RangeThe current measurement range indicates the maximum and minimum current the clamp meter can measure. This is important because it determines the types of electrical systems you can work with. Clamp meters typically have ranges from a few milliamps (mA) to several hundred amps (A). For residential or light commercial use, a range up to 400A is usually sufficient. For industrial applications, you might need a meter that can handle up to 1000A or more. Choose a clamp meter with a range that covers the highest current you expect to measure.
AC/DC MeasurementClamp meters can measure either AC (alternating current), DC (direct current), or both. AC measurement is common in household and commercial electrical systems, while DC measurement is essential for automotive, solar, and battery applications. If you only need to measure household currents, an AC-only clamp meter will suffice. However, if you work with a variety of electrical systems, a clamp meter that can measure both AC and DC currents will be more versatile and useful.
Jaw Opening SizeThe jaw opening size determines the maximum diameter of the conductor the clamp meter can encircle. This is crucial for ensuring the meter can fit around the wires or cables you need to measure. Jaw openings typically range from 0.5 inches to over 2 inches. For standard household wiring, a smaller jaw opening is usually adequate. For larger industrial cables, you'll need a clamp meter with a larger jaw opening. Consider the size of the conductors you'll be working with to choose the appropriate jaw opening size.
True RMSTrue RMS (Root Mean Square) capability allows the clamp meter to provide accurate readings for both sinusoidal and non-sinusoidal AC waveforms. This is important for measuring current in systems with variable frequency drives, electronic ballasts, or other non-linear loads. If you work with modern electrical systems that may have distorted waveforms, a True RMS clamp meter is essential for accurate measurements. For basic applications with purely sinusoidal waveforms, a standard clamp meter without True RMS may be sufficient.
Additional FunctionsMany clamp meters come with additional functions such as voltage measurement, resistance measurement, continuity testing, and temperature measurement. These features can add versatility to your tool, allowing you to perform multiple tests with a single device. If you need a multi-functional tool for various electrical tasks, look for a clamp meter with these additional capabilities. However, if you only need to measure current, a basic clamp meter without extra functions may be more straightforward and easier to use.
Display and ReadabilityThe display of the clamp meter should be clear and easy to read, even in low-light conditions. Look for features like a backlit display, large digits, and a high-contrast screen. Some clamp meters also have data hold functions to freeze the reading on the display, which can be helpful when working in awkward positions. Choose a clamp meter with a display that you can easily read in the environments where you'll be using it.
Safety RatingsSafety ratings, such as CAT (Category) ratings, indicate the environments in which the clamp meter can be safely used. These ratings are based on the potential transient overvoltages that the meter can withstand. For example, CAT III is suitable for distribution panels and fixed installations, while CAT IV is for outdoor installations and utility connections. Always choose a clamp meter with a safety rating appropriate for the highest category of electrical environment you will be working in to ensure your safety.

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