Tech & Gadgets · Head-to-head
Fluke 376 FC True-RMS Clamp Meter with iFlex vs Klein Tools CL810 600A AC/DC Auto-Ranging TRMS Clamp Meter
Which should you buy? Our verdict on both, pulled from our full The Best Clamp Meters: 4 Compared (and One to Skip) comparison.
The 376 FC is the most complete meter here, with the widest current coverage, a flexible probe for conductors that will not fit a rigid jaw, and Fluke's published accuracy behind it. The CL810 covers most of the same ground, resolves far smaller currents, and adds a temperature input, which is why it is the one most people should actually buy.
Fluke 376 FC True-RMS Clamp Meter with iFlex
Buy itThe most capable meter here, with a flexible 2500 A probe in the box and published accuracy for everything it claims.
- Reads 999.9 A of both AC and DC through the 34 mm jaw at 2% plus 5 digits.
- The included iFlex flexible probe extends AC current to 2500 A and weaves around conductors a rigid jaw cannot reach.
- Inrush capture and an always active low pass filter for adjustable speed drives and electronic ballasts.
- One current range, 999.9 A, at 0.1 A resolution, so small control currents are below what it can resolve.
- No temperature input, which rules it out as a single tool for HVAC service work.
- Fluke's own crest factor spec adds 2% above a crest factor of 2, so very peaky waveforms still cost you accuracy.
Klein Tools CL810 600A AC/DC Auto-Ranging TRMS Clamp Meter
Buy itCovers most of what the Fluke does, resolves far smaller currents, and adds a thermocouple input.
- Two current ranges, 60.00 A resolving to 10 mA and 600.0 A resolving to 100 mA, on both AC and DC.
- A separate 200.0 microamp DC range at 0.1 microamp resolution for flame sensors and control loops.
- Inrush at 600.0 A, a K type temperature input, LoZ for ghost voltages, jaw mounted voltage sensing and a worklight.
- 600 A ceiling, so large service conductors are out of range.
- No flexible probe option, so the 1.4 in jaw is the only way in.
- Klein specifies the current ranges over 50 to 60 Hz only.
Side by side
| Fluke 376 FC True-RMS Clamp Meter with iFlex | Klein Tools CL810 600A AC/DC Auto-Ranging TRMS Clamp Meter | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Electricians and maintenance techs measuring feeders, motors and service conductors where the number has to be defensible. | The electrician or serious DIYer who wants one clamp meter that handles both big loads and small ones. |
| Price tier | $$$ · premium | $$ · mid-range |
The bottom line
Our overall pick is the Fluke 376 FC True-RMS Clamp Meter with iFlex - The most capable meter here, with a flexible 2500 A probe in the box and published accuracy for everything it claims. Choose the Klein Tools CL810 600A AC/DC Auto-Ranging TRMS Clamp Meter instead if the electrician or serious DIYer who wants one clamp meter that handles both big loads and small ones.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Clamp Meters: 4 Compared (and One to Skip).