Klein Tools CL445 vs Klein Tools CL490

Last updated: November 9, 2026

The Klein Tools CL445 rates 3.7 among AC only clamp meters; the Klein Tools CL490 rates 3.7 among AC/DC ones. The Klein Tools CL445 costs $6.81 less ($94.85 vs $101.66).

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 CL445 vs Klein Tools CL490

Scores side by side

These two sit in different type classes (AC only and AC/DC), 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 weightKlein Tools CL445Klein Tools CL490
Overall rating3.7/53.7/5
Current range 15%60 600 A through the jaw46 400 A through the jaw
DC current 15%25 DC microamps (600 uA) through the test leads only100 DC current to 400 A through the jaw
Safety rating 20%100 CAT IV 600 V / CAT III 750 V55 CAT III 600 V
Features 15%65 true RMS, inrush, non-contact voltage, temperature, DC microamps50 true RMS, non-contact voltage, temperature, DC microamps
Accuracy 10%67 2% of reading67 2% of reading
Jaw opening 5%40 32 mm jaw70 41 mm jaw
Warranty 10%50 2-year warranty50 2-year warranty
Price 10%72 $94.8569 $101.66

Specifications

Klein Tools CL445Klein Tools CL490
Measurement
AC current (jaw)600 A400 A
DC current (jaw)No400 A
DC microamps (leads)600 uA200 uA
Voltage750 V600 V
Current accuracy2% of reading2% of reading
Jaw opening32 mm41 mm
Safety
CAT ratingCAT IV 600 V / CAT III 750 VCAT III 600 V
Features
True RMSYesYes
InrushYesNo
LoZ modeNoNo
Non-contact voltageYesYes
Low-pass filterNoNo
TemperatureYesYes
Phone appNoNo
Build
Weight357 g346 g
Warranty2 years2 years

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