10 Best Clamp Multimeters 2025 in the United States

The AstroAI Inrush Digital Clamp Meter Multimeter stands out for its versatility and accurate measurements. With a current measurement range of up to 1000 A for both AC and DC, and voltage measurement capabilities up to 1000 V DC/750 V AC, it is well-suited for a variety of tasks including industrial electrical testing, high-power equipment maintenance, and solar PV projects. The inclusion of inrush current measurement is particularly helpful for diagnosing startup issues in motors, although it is limited to AC current only. This might be a drawback if you need to test DC inrush current specifically.

The VFD and LoZ modes enhance its accuracy in measuring currents and voltages on variable frequency drives and eliminate ghost voltages, respectively, which can be highly beneficial in complex electrical environments. Additional functions like temperature, resistance, capacitance, frequency, continuity, and NCV detection further expand its usability. The NCV feature adds a layer of safety by allowing voltage testing without physical contact. The device is thoughtfully designed with a backlit LCD and flashlight, improving readability in low-light conditions.

Data hold, max/min, auto/manual ranging selection, and REL/ZERO functions enhance its convenience and ease of use. It complies with high safety standards (IEC 61010-1, CAT IV 600V, CAT III 1000V), making it reliable for professional use. This multimeter is lightweight, making it portable and easy to handle during fieldwork.

The AstroAI Digital Clamp Meter offers a solid set of features for both household and light industrial electrical tasks. It can measure AC/DC current and voltage, resistance, capacitance, frequency, and more, making it quite versatile. The inclusion of non-contact voltage detection with audible and visual alerts is a handy safety feature, helping users identify live wires without direct contact. Its display is backlit with a flashlight, which is useful for working in dim conditions, and additional functions like data hold, max/min readings, and auto power off add convenience and help conserve battery life.

The jaw opening is designed to fit around single wires easily, allowing safe current measurement without interrupting circuits, although it is not suitable for clamping whole cords for current. Safety-wise, it meets the overvoltage category III 600V standard, which is suitable for most residential and commercial applications. The device uses 2 AAA batteries, which may require frequent replacement compared to rechargeable options.

It is a dependable clamp meter for general electrical troubleshooting and maintenance, especially if you want a tool that balances ease of use with a variety of measurement functions.

The Fluke 323 Clamp Meter is a reliable tool for both commercial and residential electricians. It measures AC current up to 400 amps and AC/DC voltage up to 600 volts, which is quite ample for most electrical tasks. The device is accurate, thanks to its True RMS sensing feature, ensuring precise readings even with complex waveforms. However, it does not measure DC current, which might be a limitation for some users.

The resistance measurement capacity goes up to 4 kilo ohms, and it has a 1% accuracy rate plus/minus 5 digits, making it suitable for basic troubleshooting tasks. The audible continuity sensor is a handy feature, instantly confirming if a circuit is live. Its jaw opening size of 30 mm allows it to measure current in conductors without needing to touch or disrupt the circuit, adding to its safety and convenience.

Safety-wise, it meets the IEC 61010-1 standard and is rated for CAT IV installations up to 300V and CAT III up to 600V, ensuring it adheres to high safety standards. The lightweight design and the inclusion of a soft carrying case make it portable and easy to handle. Despite being released in 2011, it remains a popular and dependable choice, backed by a 2-year warranty. The digital display is clear and easy to read, enhancing user experience. While the lack of DC current measurement is a downside, its other features and reliability make it a valuable tool for most electrical measurement needs.