10 Best Clamp Meters

The Fluke 773 Clamp Meter is a specialized tool designed for measuring milliamp signals, particularly useful in PLC and control system analog I/O applications. It boasts a high-resolution sensitivity of 0.01 mA, allowing for precise measurements without the need to break the loop, making it convenient and time-saving for users working with 4 to 20 mA signals. This feature makes it highly suitable for professionals dealing with process control and instrumentation tasks.

The device's modern design, coupled with a lightweight build (410 grams), ensures ease of handling during prolonged usage. The inclusion of 4 AA batteries, alongside its alkaline power source, means it is ready for action right out of the box, adding to its user-friendly appeal. Safety-wise, it meets IEC 1010 standards, ensuring reliable operation in various environments.

However, the Fluke 773 does not cover typical clamp meter functionalities like AC/DC current measurements or broader current ranges beyond milliamp signals, which might limit its versatility for general electrical work. The jaw opening size isn’t specified, which could be a drawback for those needing to measure larger conductors. Display readability seems adequate but isn’t highlighted as a standout feature. While the Fluke 773 is excellent for specific process control measurements, it may not be the best fit for users needing a more versatile clamp meter for general electrical tasks.

The Fluke 116/323 HVAC Combo Kit is a reliable choice for those in the HVAC industry. This kit includes the Fluke 116 Digital Multimeter and the Fluke 323 True-rms Clamp Meter, catering well to HVAC technicians' needs. One of its standout features is the built-in thermometer, which is particularly useful for HVAC applications, making temperature measurement straightforward without needing additional tools.

The clamp meter can measure up to 400 A AC, which is suitable for most HVAC current measurement requirements. Its true-rms capability ensures accurate readings even with non-linear loads, which is a plus for precision in testing. Additionally, it supports microamps measurement, useful for testing flame sensors—a critical task in HVAC maintenance.

Regarding usability, the kit is user-friendly with a clear display that aids readability in various working conditions. The included accessories, like test leads and manuals, add to the convenience factor by providing everything needed out of the box. Its compact size and relatively light weight (549 g) enhance portability, beneficial for fieldwork.

The combo kit is robust and precise, but it has a few limitations. The jaw opening size isn’t specified, which could be crucial for users needing to measure larger conductors. Also, it only measures AC current, which may not suffice for those who need DC current measurement capabilities. The longstanding availability since 2013 suggests it is a trusted option by many professionals.

The Fluke 393 FC clamp meter is a reliable tool for measuring electrical currents up to very high voltages safely, thanks to its CAT III 1500 V rating. This safety rating enables it to handle measurements in demanding environments, such as industrial or outdoor sites. Its thin jaw design is especially handy for reaching into tight spaces like crowded combiner boxes, improving ease of use in tricky spots.

The meter supports both AC and DC current measurements, which is essential for versatility across different electrical systems. It also includes useful features like audio polarity testing and visual continuity checks, helping with diagnosing electrical circuits efficiently. The unit is rugged and weather-resistant (IP54 rated), making it suitable for outdoor use without worry. The solar-powered design offers a green energy option, though it still requires alkaline batteries for extended use.

Weighing about 520 grams, the clamp meter is reasonably portable without being ultra-light. It comes with premium accessories such as test leads and a carrying case, providing good value for professionals or serious DIYers working on complex electrical systems. This clamp meter suits users who prioritize safety and durability, especially in challenging environments.