Klein Tools - For Professionals Since 1857

Digital Clamp Meter, AC Auto-Ranging 400 Amp with Temp


  • Clamp Meter measures AC current and NCVT via a clamp, as well as AC/DC voltage, resistance and continuity via test-leads, and temperature with a thermocouple
  • Non-contact voltage tester integrated into the clamp jaw
  • Backlit LCD for ease of viewing in low light
  • Automatically ranging true root mean squared (TRMS) measurement technology for accuracy
  • Test lead holder on side of clamp and optional magnetic hanger for meter (Cat. Nos. 69445 or 69417) for hands-free operation
  • Measures temperature with a K-Type thermocouple probe
  • Auto-Range, Hold, Data Hold and Max value
  • Auto Power-Off after 10 minutes to conserve battery life
  • Includes a carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, instructions and 3 x AAA batteries
  • Low-battery indicator and easily accessible battery compartment
  • Built to withstand a 6.6' (2 m) drop
  • CAT III 600 V, Class 2, Double insulation safety rating
  • Meets requirements for use in basic and controlled electromagnetic environments such as residential, office and light-industrial locations
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Klein Tools CL220 Clamp Meter is an automatically ranging true root mean square (TRMS) digital clamp meter that measures AC current and NCVT via the clamp, AC/DC voltage, resistance and continuity via test-leads, and temperature via a thermocouple probe. Exclusively designed from the ground up, by electricians for electricians. Years of field research, combined with extensive input from electricians across America, have inspired the development of meters loaded with innovative, time-saving features.

Auto-Ranging TRMS Clamp with Temperature
Measures AC Current and NCVT via a Clamp, as well as AC/DC Voltage, Resistance and Continuity via Test-Leads, and Temperature with a Thermocouple
Special Features:
Automatically Ranging True Root Mean Squared (TRMS) Measurement Technology for Accuracy; NCVT; Added Temperature
3 x AAA
Auto Shut Off:
Jaw Size:
1.61'' (4.1 cm)
Drop Protection:
6.6' (2 m)
2000 Count Backlit LCD
TRMS, AC Current, NCVT, AC/DC Voltage, Resistance, Continuity and Temperature
600 V AC/DC
400 A AC
Ohms (Resistance):
20 MΩ
AC Voltage:
600 V
DC Voltage:
600 V
DC Polarity Indicator:
Temperature Range:
-40 °F-1832 °F (-40 °C-1000 °C)
CATIII 600V, Class 2, Double Insulation Safety Rating, CE Certified
Carrying Case, Instructions, Test Leads, Thermocouple and Batteries
Overall Length:
8.45'' (21.5 cm)
Overall Height:
1.51'' (3.8 cm)
Overall Width:
3.51'' (8.9 cm)
11 oz (314 g)
Additional Information
  • Read, understand and follow all instructions, cautions and warnings attached to and/or packed with all test and measurement devices before every use.
  • Do not attempt to measure resistance or continuity on live circuits.
  • Before every use, verify meter operation by measuring a known voltage or current.
  • Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.
  • Usage of this meter in any way other than that specified by the manufacturer can impair safe operations, resulting in severe injury or death.