Extech EX655 vs Klein Tools CL445

Last updated: November 9, 2026

The Extech EX655 rates 3.7 among AC/DC clamp meters; the Klein Tools CL445 rates 3.7 among AC only ones. The Klein Tools CL445 costs $78.65 less ($94.85 vs $173.50).

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.

Extech EX655 vs Klein Tools CL445

Scores side by side

These two sit in different type classes (AC/DC and AC only), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.

Factor weightExtech EX655Klein Tools CL445
Overall rating3.7/53.7/5
Current range 15%60 600 A through the jaw60 600 A through the jaw
DC current 15%100 DC current to 600 A through the jaw25 DC microamps (600 uA) through the test leads only
Safety rating 20%55 CAT III 600 V / CAT II 1,000 V100 CAT IV 600 V / CAT III 750 V
Features 15%60 true RMS, inrush, non-contact voltage, temperature65 true RMS, inrush, non-contact voltage, temperature, DC microamps
Accuracy 10%33 2.5% of reading67 2% of reading
Jaw opening 5%33 30 mm jaw40 32 mm jaw
Warranty 10%100 3-year warranty50 2-year warranty
Price 10%46 $173.5072 $94.85

Specifications

Extech EX655Klein Tools CL445
Measurement
AC current (jaw)600 A600 A
DC current (jaw)600 ANo
DC microamps (leads)-600 uA
Voltage1,000 V750 V
Current accuracy2.5% of reading2% of reading
Jaw opening30 mm32 mm
Safety
CAT ratingCAT III 600 V / CAT II 1,000 VCAT IV 600 V / CAT III 750 V
Features
True RMSYesYes
InrushYesYes
LoZ modeNoNo
Non-contact voltageYesYes
Low-pass filterNoNo
TemperatureYesYes
Phone appNoNo
Build
Weight265 g357 g
Warranty3 years2 years

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