Best Clamp Meters for Electricians: AC, DC and Service Work
Start with Fluke 323 for straightforward AC load checks. Choose Fluke 325 or Klein CL390 when DC current matters, CL810 when its broader range and inrush feature match your work, or CL220 for a simpler AC-current and temperature kit.
5 picks · 1 full reviewUS-focusedResearch-based recommendations
Product image: Fluke. Check the listing for included accessories.
AC/DC voltage measurement does not mean a clamp measures DC current. The jaw capability is the first specification to compare. Klein CL810 replaces the discontinued CL800 in this shortlist.
HOW TO CHOOSE
What matters for the work
AC or DC through the jaw?
Identify the current type you need to measure. Fluke 323 and Klein CL220 are AC-current choices; Fluke 325, CL390 and CL810 support AC/DC current. A meter can read DC voltage through leads without measuring DC current through its clamp.
Range is not resolution
A larger maximum amp rating does not automatically make small loads easier to assess. Compare measurement ranges, published accuracy and conductor access. For startup behavior, confirm an inrush function instead of assuming a hold button captures it.
Keep a multimeter role in the kit
A clamp suits current measurements around an appropriate conductor; a multimeter serves other diagnostic tasks. Check category ratings, lead suitability and your work procedure. None of these buying recommendations authorizes work outside your training.
We compared manufacturer specifications and documented features. We have not hands-on tested these products. Read our recommendation method →
Detailed picks
Useful differences, meaningful drawbacks and the specifications behind each recommendation.
OPTION 1
Product image: Fluke. Check the listing for included accessories.Lead pick for AC service checks
Lead pick for AC service checks
Fluke
323 True-RMS Clamp Meter
Best for: Residential and commercial service technicians who need AC current and already have a primary multimeter.
The 323 is the focused AC-current member of Fluke’s 320 family. Its appeal is an uncomplicated clamp for load-related service work, rather than another instrument with every possible measurement function.
Choose it when the job requires routine AC load checks and the rest of the kit already covers temperature or more specialized measurements. Compare 325 before purchase if any regular job needs DC current: buying an AC-only jaw for that task would be the wrong saving.
Product image: Fluke. Check the listing for included accessories.For AC and DC current
For AC and DC current
Fluke
325 True-RMS Clamp Meter
Best for: Technicians whose permitted work includes both AC and DC current measurements.
Fluke 325 adds DC jaw current to the 320-family service format. That is a functional distinction worth paying attention to; many similarly named clamps measure DC voltage but only AC current.
Compare it with 323 by the jobs that need DC, temperature or frequency rather than by the family name. It remains a general service clamp, so verify any specialist logging or inrush requirement separately.
AC/DC jaw current
True-RMS
Temperature and frequency functions
Jaw current
AC/DC to 400 A
Voltage
AC/DC to 600 V
Family
Fluke 320 series
Main tradeoff: Extra functions may duplicate existing instruments
Product image: Klein Tools. Check the listing for included accessories.For a mixed diagnostic kit
For a mixed diagnostic kit
Klein Tools
CL390 TRMS AC/DC Clamp Meter
Best for: Technicians wanting AC/DC clamp current with temperature and other diagnostic functions.
CL390 combines AC/DC clamp measurement with a broad set of lead-based functions. Its category rating and actual ranges are more relevant to choosing it than how many symbols appear on the dial.
A useful alternative to the Fluke pair when the listed functions align with the work. Check the included temperature probe and current manual; we have not tested display readability or comparative accuracy.
AC/DC jaw current
TRMS
Temperature via thermocouple
Jaw current
AC/DC to 400 A
Safety category
CAT III 600 V
Temperature
Thermocouple measurement
Main tradeoff: More controls to learn than an AC-only clamp
Product image: Klein Tools. Check the listing for included accessories.For broader range and inrush
For broader range and inrush
Klein Tools
CL810 TRMS Clamp Meter with Worklight
Best for: Technicians who need its 600 A AC/DC range and documented inrush function.
The CL810 offers a broader current range and an inrush function alongside its worklight and diagnostic measurements. Those additions are reasons to investigate it for maintenance work, rather than proof of better measurements at every load.
Select it when range or startup-current assessment is a real requirement. The discontinued CL800’s specifications should not be carried into this model; evaluate CL810 and its supplied accessories directly.
Product image: Klein Tools. Check the listing for included accessories.For a simpler AC kit
For a simpler AC kit
Klein Tools
CL220 AC Clamp Meter with Temperature
Best for: Users whose tasks need AC load checks and a temperature function.
CL220 is an AC-current option with temperature measurement and an integrated non-contact indicator. That feature mix can suit a straightforward kit, but it should not be evaluated as though it had CL390’s AC/DC TRMS specification.
Choose on verified requirements, not an assumed budget advantage. If DC current or waveform-sensitive AC measurements matter, compare CL390 or the Fluke options before ordering.
