Klein Tools Digital Clamp Mete...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$148.87
$105.91
Klein Tools Digital Clamp Meter, AC Auto-Ranging 400 Amp with Temp

Klein Tools Digital Clamp Meter AC Auto-Ranging 400 Amp TRMS Temperature NCVT 600V

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Model: CL220
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$148.87
$105.91
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Klein Tools Digital Clamp Meter AC Auto-Ranging 400 Amp TRMS Temperature NCVT 600V

Professional-Grade True RMS Clamp Meter with Temperature Measurement

The Klein Tools Digital Clamp Meter delivers professional-grade electrical measurement performance for comprehensive AC current testing and temperature monitoring. This True RMS clamp meter features auto-ranging technology and integrated NCVT designed for electricians, linemen, and electrical professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Advanced Measurement Technology

  • True RMS Auto-Ranging - Delivers accurate measurements on non-linear loads with Klein's precision engineering for professional electrical diagnostics
  • 400 Amp AC Current Capacity - Handles high-amperage applications with 1.6-inch jaw opening for large conductors and cable bundles
  • Integrated NCVT Detection - Non-contact voltage testing built into clamp jaw provides safe voltage detection without test lead contact
  • K-Type Thermocouple Temperature - Measures -40° to 1832°F temperature range for comprehensive HVAC and electrical system diagnostics

Safety and Durability Standards

  • CAT III 600V Safety Rating - Class 2 double insulation protection meets rigorous safety standards for electrical work environments
  • 6.6-Foot Drop Protection - Rugged ABS construction withstands jobsite impacts and harsh working conditions with Klein quality durability
  • Backlit LCD Display - 2000-count display with backlighting ensures clear readings in low-light electrical panels and confined spaces

Professional Convenience Features

  • Auto Power-Off Function - 10-minute automatic shutdown conserves battery life during extended troubleshooting sessions
  • Data Hold and Max Value - Captures and holds readings for documentation and analysis of electrical system performance
  • Complete Professional Kit - Includes carrying case, test leads with safety caps, thermocouple probe, and batteries for immediate field use

Technical Specifications

Measures 400A AC current, 600V AC/DC voltage, 20 MΩ resistance, continuity, and temperature -40° to 1832°F. Overall dimensions 8.45" length x 3.51" width x 1.51" height, weighing 0.61 lbs. Features 1.6" jaw capacity, 2000-count backlit LCD display, powered by 3 AAA batteries with low battery indicator and auto power-off.

Installation & Usage

  1. Verify meter operation by testing known voltage source before each use following Klein Tools safety protocols
  2. Select appropriate measurement function using rotary switch for current, voltage, resistance, or temperature testing
  3. For current measurement, open clamp jaw and position around single conductor ensuring complete jaw closure
  4. Use NCVT function by positioning clamp near energized conductors for non-contact voltage detection
  5. Connect test leads to meter and circuit points for voltage, resistance, and continuity measurements
  6. Attach K-type thermocouple for temperature measurements in HVAC and electrical equipment diagnostics

Professional Applications

Ideal for:

  • Electrical Installation - Current measurement and load analysis in residential, commercial, and industrial electrical systems
  • Motor and Equipment Testing - Troubleshooting motor current draw, compressor amperage, and electrical equipment performance
  • Panel and Circuit Analysis - Branch circuit loading, main service current monitoring, and electrical system diagnostics
  • HVAC System Diagnostics - Temperature measurement and electrical testing of heating, cooling, and ventilation equipment
  • Industrial Maintenance - Preventive maintenance current monitoring and temperature analysis of industrial electrical systems
  • Telecommunications Work - Current measurement and voltage testing in communication and data system installations
  • Automotive Electrical - Battery, alternator, and electrical system testing with temperature monitoring capabilities
  • Solar and Renewable Energy - DC voltage measurement and current monitoring in photovoltaic and alternative energy systems

True RMS Technology Advantage

Klein Tools True RMS measurement technology provides accurate readings on non-linear loads including variable frequency drives, electronic ballasts, and switching power supplies. This advanced measurement capability ensures precise diagnostics on modern electrical systems with distorted waveforms, delivering the accuracy electrical professionals require for proper system analysis and troubleshooting.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has maintained America's legacy of excellence in electrical tool manufacturing, combining precision engineering with rigorous safety testing protocols. This digital clamp meter represents Klein's commitment to professional-grade reliability, featuring robust construction, accurate measurement technology, and comprehensive safety certifications trusted by electricians and electrical professionals nationwide for critical electrical system diagnostics.



KLN-CL220 - spec sheet

Manufacturer Resources

Product Specs

Ac Voltage:
600 V
Application:
Measures AC Current and NCVT via Clamp and AC/DC Voltage, Resistance, and Continuity via Test-leads, and Temperature with Thermocouple
Auto Power Off:
Yes
Batteries:
3 x AAA
Current:
400 A AC
Dc Polarity Indicator:
Yes
Dc Voltage:
600 V
Depth:
8.4500 in
Display:
2000 Count Backlit LCD
Drop Protection:
6.6' (2 m)
Included:
Digital Clamp Meter; Carrying Case; Instructions; Test Leads; Thermocouple; Batteries
Jaw Size:
1.6" (4.1 cm)
Ohms Resistance:
20 MΩ
Overall Height:
1.5" (3.8 cm)
Overall Length:
8.45" (21.5 cm)
Overall Width:
3.5" (8.9 cm)
Standard:
CATIII 600V, Class 2, Double Insulation Safety Rating, CE Certified
Temperature Range:
-40° - 1832°F (-40° - 1000°C)
Product Type:
Auto Ranging TRMS Clamp with Temperature
Department:
Electrical
Product Group:
Test & Measurement
Product Subgroup:
Environmental Meters
Product Voltage:
600 V AC/DC
Product Function:
TRMS, AC Current, NCVT, AC/DC Voltage, Resistance, Continuity and Temperature
Product Details:
Auto Ranging TRMS Clamp with Temperature
Product Height:
1.5060 in
Product Material:
ABS/Electronics
Product Category:
Clamp Meters
Product Weight:
0.6130 lbs
Product Width:
3.5120 in

Klein Tools CL220 – Frequently Asked Questions

1) What current range does this 400 amp clamp meter measure?
This digital clamp meter measures AC current up to 400 amps with auto-ranging functionality. It automatically selects the appropriate measurement range for accurate readings across the full spectrum.
2) Can this meter measure temperature and what range does it cover?
Yes, this clamp meter includes temperature measurement capability. The exact temperature range varies by model, but most professional-grade units measure from -40°F to over 1000°F using the included temperature probe.
3) What wire sizes can fit through the clamp jaw opening?
The clamp jaw opening typically accommodates conductors up to 1.2 inches in diameter. This allows measurement of most residential and commercial wiring, including multiple conductors or larger gauge wire.
4) Does this meter measure both AC voltage and resistance?
Most digital clamp meters in this class measure AC voltage up to 600V and resistance values. Check the specific model specifications to verify voltage ranges and resistance measurement capabilities for your applications.
5) How do I properly clamp around a conductor for accurate readings?
Center the single conductor within the clamp jaw opening. Ensure the jaw closes completely and the conductor passes through the center of the opening. Avoid clamping around multiple hot conductors simultaneously as this can cancel readings.
6) What safety category rating should I look for in electrical work?
For electrical work, look for CAT III or CAT IV safety ratings. These ratings indicate the meter can safely handle transient voltages in distribution and installation environments. Always verify the specific safety rating before use.
7) Are test leads included with this clamp meter?
Most digital clamp meters include basic test leads and a temperature probe. Some models may include additional accessories like a carrying case or instruction manual. Check the product specifications for included accessories.
8) How do I zero or calibrate the meter before taking measurements?
Close the clamp jaw around no conductor and press the zero or relative button if available. This removes any residual offset from the readings. Some auto-ranging meters automatically zero when powered on with an open jaw.
9) What type of battery does this meter typically use?
Digital clamp meters commonly use 9V batteries or AA batteries depending on the model. Battery life varies with usage but typically provides hundreds of hours of operation. Low battery indicators alert when replacement is needed.
10) Can this meter detect current in cables or conduit?
The clamp can measure current through individual insulated conductors within cables. However, clamping around complete cables with both hot and neutral conductors will show zero or minimal reading due to current cancellation.
11) How accurate are the current measurements on this auto-ranging meter?
Professional digital clamp meters typically provide accuracy within 2-3% of reading plus a few digits. Auto-ranging ensures optimal resolution across the measurement range. Accuracy can be affected by conductor position within the jaw opening.
How fast can I get the Klein Tools CL220 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools CL220 come with a warranty?
Absolutely. The Klein Tools CL220 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools CL220?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools CL220 from ZenSupply?
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