Fluke 323
#5 in AC onlyFull review
A simple, well-built true-RMS AC clamp for electricians who want a Fluke for everyday panel and circuit checks.
Amazon $152.85$152.85
The Fluke 323 and the Klein Tools CL120 are evenly matched, rated 3.0 and 3.0. The Fluke 323 leads on safety rating and features. The Klein Tools CL120 wins on price and jaw opening. The Klein Tools CL120 costs $88.96 less ($63.89 vs $152.85).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Klein Tools CL120
#7 in AC onlyFull review
An inexpensive AC clamp for homeowners and apprentices who need occasional current and voltage checks.
Amazon $63.89$63.89
Which should you buy?
- Choose the Fluke 323 for safety rating (CAT IV 300 V / CAT III 600 V vs CAT III 600 V) and features (true RMS vs non-contact voltage).
- Choose the Klein Tools CL120 for price ($63.89 vs $152.85) and jaw opening (41 mm jaw vs 30 mm jaw).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every AC only clamp meter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fluke 323 | Klein Tools CL120 |
|---|---|---|
| Overall rating | 3.0/5 | 3.0/5 |
| Current range 15% | 46 400 A through the jaw | 46 400 A through the jaw |
| DC current 15% | 0 no DC current | 0 no DC current |
| Safety rating 20% | 75 CAT IV 300 V / CAT III 600 V | 55 CAT III 600 V |
| Features 15% | 25 true RMS | 10 non-contact voltage |
| Accuracy 10% | 67 2% of reading | 67 2% of reading |
| Jaw opening 5% | 33 30 mm jaw | 70 41 mm jaw |
| Warranty 10% | 50 2-year warranty | 50 2-year warranty |
| Price 10% | 51 $152.85 | 89 $63.89 |
Specifications
| Fluke 323 | Klein Tools CL120 | |
|---|---|---|
| Measurement | ||
| AC current (jaw) | 400 A | 400 A |
| DC current (jaw) | No | No |
| Voltage | 600 V | 600 V |
| Current accuracy | 2% of reading | 2% of reading |
| Jaw opening | 30 mm | 41 mm |
| Safety | ||
| CAT rating | CAT IV 300 V / CAT III 600 V | CAT III 600 V |
| Features | ||
| True RMS | Yes | No |
| Inrush | No | No |
| LoZ mode | No | No |
| Non-contact voltage | No | Yes |
| Low-pass filter | No | No |
| Temperature | No | No |
| Phone app | No | No |
| Build | ||
| Weight | 265 g | 313 g |
| Warranty | 2 years | 2 years |