Fluke 373 True-RMS AC Clamp Meter Review: Accurate & Reliable

With many years of experience testing and reviewing clamp meters, I understand what matters most when choosing a reliable tool. I have spent time using the Fluke 373 True-RMS AC Clamp Meter in different situations to see how it performs. My goal is to give you a clear and honest review based on careful research and hands-on testing. This way, you can trust the information and make a smart choice when buying this meter. In this review, I will explain the main features, benefits, and any drawbacks to help you decide if the Fluke 373 is the right tool for your work.

Pros & Cons

What We Loved

• ✅ Large, easy to read backlight display
• ✅ Automatic range selection for convenience
• ✅ True-RMS for accurate AC/DC measurements
• ✅ Stable readings in noisy electrical environments

What Could Be Better

• ❌ Soft carrying case offers limited protection
• ❌ May be bulky for tight spaces
• ❌ No wireless connectivity features

Who Should Buy This

The Fluke 373 True-RMS AC Clamp Meter is perfect for electricians, HVAC technicians, and maintenance professionals. It is ideal for those who need to measure current safely and accurately on single conductors up to 1.26 inches in diameter. If you work with electrical systems regularly and need a reliable, easy-to-use tool for troubleshooting and testing, this clamp meter is a great choice.

If you rarely work with electrical equipment or only need to measure low currents, this product might be more than you need. Also, if you require measurements on larger conductors or specialized features beyond basic AC current and voltage testing, you should look for a different clamp meter that fits those needs better.

Technical Specifications

Key Details

• Brand: Fluke
• Model: FLUKE-373
• Size: 5.91″ x 11.02″ x 12.99″
• Weight: 0.82 lbs
• Material: Durable plastic housing
• Color Options: Yellow
• Special Features: True-RMS measurement, AC current clamp meter, auto-ranging, large jaw capacity
• Warranty: 3 years

Our Testing Experience

First Impressions

When I first got the Fluke 373 True-RMS AC Clamp Meter, I was excited to try it out. I immediately noticed how the large backlit display made it easy to read the numbers, even in low light. I tested it on a few different wires around my house, and I didn’t have to fiddle with any switches because it automatically picked the right measurement range. That made the whole process smooth and simple from the start.

Daily Use

Using the clamp meter every day was surprisingly hassle-free. The size was just right—not too big or heavy—so it felt comfortable to hold while I moved around. The soft carrying case was handy too, keeping it safe when I wasn’t using it. I used it to check both AC and DC currents, and the readings were consistent and easy to trust, especially on tricky non-linear signals where some meters can struggle.

Key Features in Action

The True-RMS feature really stood out to me. It gave accurate readings even when the signals weren’t steady, which is common with modern electronics. The automatic range setting saved me time because I didn’t have to guess the right setting or stop and change it. Plus, the backlight was a lifesaver when I worked in darker spots. Overall, these features made testing faster and less stressful.

Long-Term Performance

After using the Fluke 373 for several weeks, it still worked perfectly. The battery life lasted longer than I expected, and the meter stayed reliable with no strange readings or glitches. I feel confident that it can handle regular use for a long time. It’s become my go-to tool whenever I need to measure current or voltage, and I’d recommend it to anyone who wants accuracy and ease of use.

How It Compares

Side-by-Side Comparison

Feature	Fluke 373 True-RMS AC Clamp Meter	Fluke 323 Clamp Meter	Fluke 365 Detachable Jaw Clamp Meter
Price	See Price	See Price	See Price
Quality	High-quality True-RMS measurements with large backlight display and automatic range setting for ease of use; reliable and accurate on non-linear signals.	Reliable True-RMS sensing with accuracy on linear and non-linear loads; measures AC current but lacks DC current measurement.	True-RMS accuracy with a detachable jaw for flexible access; measures both AC and DC current up to 200 A.
Features	Large backlight display with auto range; True-RMS AC/DC voltage and current measurements; soft carrying case included.	Measures AC current to 400 A, AC/DC voltage to 600 V, resistance to 4 kΩ; continuity detection; jaw opening fits up to 30 mm conductor; no DC current measurement.	Measures AC/DC current up to 200 A; 600 V AC/DC voltage; detachable jaw for easier wire access and display viewing.
Best For	Electricians and technicians needing accurate True-RMS AC/DC measurements with easy-to-read display and auto-ranging for non-linear signals.	Commercial/residential electricians requiring higher AC current capacity (up to 400 A) and resistance measurements, but no DC current measurement.	Users who want flexibility accessing wires with detachable jaw and need both AC/DC current measurements up to 200 A.

In my opinion, this Fluke 373 True-RMS AC Clamp Meter stands out because it offers a large, easy-to-read backlight display with automatic range setting, making measurements quicker and simpler without needing manual range adjustments. Its True-RMS AC/DC capability ensures accurate readings on non-linear signals, which is crucial for modern electrical systems. If you’re like me and prefer a meter that combines ease of use with reliable True-RMS accuracy and versatile AC/DC measurement, this is the better choice.

Customer Feedback on Fluke 373 True-RMS AC Clamp Meter

Overall Satisfaction

The Fluke 373 True-RMS AC Clamp Meter receives generally positive feedback, with most users appreciating its accuracy and durability despite a moderate sales rank.

Most Praised Features

• Accurate True-RMS measurements praised for reliable readings.
• Robust build quality suitable for tough work environments.
• Easy-to-use clamp design that simplifies current measurements.

Common Concerns

• Display visibility can be challenging in low-light conditions.
• Some users find the price point higher compared to similar meters.

Who Loves It Most

Electricians and HVAC professionals value this meter for its precision and ruggedness, making it a trusted tool for fieldwork and troubleshooting electrical systems.

Is It Worth the Price?

Price Analysis

The Fluke 373 True-RMS AC Clamp Meter is priced competitively within the mid to high range of clamp meters, reflecting its quality and advanced features. Compared to similar True-RMS models, its price is fair and justified by its durability and precision.

Value Features

• Large backlit display automatically adjusts range, saving time and simplifying measurements.
• True-RMS AC/DC voltage and current readings ensure accuracy on complex, non-linear signals.
• Advanced signal processing provides stable readings even in noisy electrical environments.
• Includes a soft carrying case, reducing the need for additional protective gear and lowering overall costs.

Vs. Competitors

While some budget clamp meters may offer lower prices, they often lack True-RMS capability and stable readings in noisy settings. Fluke 373 strikes a good balance between cost and professional-grade features, making it a strong contender among similar products.

Final Verdict

For professionals and serious DIYers, the Fluke 373 offers excellent value for money thanks to its reliability, accuracy, and user-friendly design. It’s a worthwhile investment at this price point.