Klein Tools CL445

Last updated: November 9, 2026

Klein Tools CL445
3.7/5#1 of 8 in AC only clamp meters
3.7

An HVAC clamp with inrush, flame-sensor microamps and a CAT IV rating at a mid-range price.

  • 600 AAC current
  • NoDC current
  • CAT IV 600 V / CAT III 750 VSafety
  • 32 mmJaw
Check price at Amazon$94.85

Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Inrush mode, DC microamps and temperature cover compressor, furnace and flame-sensor checks
  • Rated CAT IV 600 V
  • Thin jaw reaches into crowded HVAC cabinets
Cons
  • Reads AC current only through the jaw
  • Smaller 1.25 in jaw than most clamps

How it scores

The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.

Specifications

Model numberCL445
Measurement
AC current (jaw)600 A
DC current (jaw)No
DC microamps (leads)600 uA
Voltage750 V
Current accuracy2% of reading
Jaw opening32 mm
Safety
CAT ratingCAT IV 600 V / CAT III 750 V
Features
True RMSYes
InrushYes
LoZ modeNo
Non-contact voltageYes
Low-pass filterNo
TemperatureYes
Phone appNo
Build
Weight357 g
Warranty2 years

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