Klein Tools CL220

Last updated: November 9, 2026

Klein Tools CL220

3.2/5#3 of 8 in AC only clamp meters
3.2

A low-cost true-RMS AC clamp for home and light electrical work, with temperature for basic HVAC checks.

400 AAC current
NoDC current
CAT III 600 VSafety
41 mmJaw

Check price at Amazon$69.97

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

Pros

True RMS for accurate readings on modern electronic loads
Non-contact voltage detector and thermocouple temperature input
Low price for a true-RMS clamp

Cons

AC current only
No inrush mode for motor and compressor starts

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.

Current range 400 A through the jaw46
DC current no DC current0
Safety rating CAT III 600 V55
Features true RMS, non-contact voltage, temperature45
Accuracy 2% of reading67
Jaw opening 41 mm jaw70
Warranty 2-year warranty50
Price $69.9785

Specifications

Measurement
Model number	CL220
AC current (jaw)	400 A
DC current (jaw)	No
Voltage	600 V
Current accuracy	2% of reading
Jaw opening	41 mm
Safety
CAT rating	CAT III 600 V
Features
True RMS	Yes
Inrush	No
LoZ mode	No
Non-contact voltage	Yes
Low-pass filter	No
Temperature	Yes
Phone app	No
Build
Weight	313 g
Warranty	2 years

Alternatives in this type

Klein Tools CL445

#1 in AC only3.7Full review

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

$94.85

600 ANoCAT IV 600 V / CAT III 750 V

#2 in AC only3.5Full review

An HVAC technician’s clamp from Fluke with flame-rod microamps, temperature and a phone app.

$329.97

600 ANoCAT IV 300 V / CAT III 600 V

#4 in AC only3.1Full review

A plain true-RMS AC clamp for electricians and technicians who only need current, voltage and resistance.

$66.99

400 ANoCAT III 600 V

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