10 Best Clamp Meters 2025 in the United States

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 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 Fluke 302+ Digital Clamp Meter is a compact and user-friendly device designed to meet various electrical measurement needs. It features a 30mm jaw opening, making it suitable for measuring large conductors. This clamp meter can measure AC currents up to 400A and AC/DC voltages up to 600V, covering a broad range of applications from residential to industrial settings. It also includes functions for resistance, continuity, and capacitance measurements, making it a versatile tool for troubleshooting and diagnostics.

The device boasts a high accuracy of 1.8%, ensuring reliable results for critical tasks. One of its standout features is the CAT IV 300V/CAT III 600V safety rating, which provides users with confidence and peace of mind when working in high-risk environments. The included Fluke TL75 Hard Point Test Lead Set adds to its practicality for general-purpose applications. The meter's display is clear and readable, enhancing ease of use.

Additionally, it is lightweight at 0.94 pounds and comes with a two-year manufacturer warranty, reinforcing its durability and reliability. However, the clamp meter requires 2 AAA batteries, which are included but may need to be replaced over time. While it offers a comprehensive range of features, the absence of True RMS functionality might be a limitation for those needing precise measurements on non-linear loads. Despite this, the Fluke 302+ remains a solid choice for professionals and DIY enthusiasts seeking a dependable and accurate clamp meter.