10 Best Clamp Meters 2025 in the United States

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.

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.

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.