A direct front studio shot of the Klein Tools CL220 HVAC clamp meter. The professional-grade orange and black device features a 400A AC current jaw with an integrated non-contact voltage tester, a high-visibility backlit digital LCD, a multi-function rotary dial, and dedicated buttons for data hold and max value capture.
A technical infographic for the CL220 HVAC clamp meter highlighting its primary sensing capabilities. Text callouts identify the 400A AC current measurement via the clamp jaw, AC/DC voltage and resistance testing via leads, and temperature measurement using the included thermocouple probe.
An angled perspective shot of the CL220 digital clamp meter against a white background. The image showcases the ergonomic side trigger for the 1.6-inch jaw opening, the high-visibility industrial housing, and the integrated test lead holder on the side of the meter for convenient storage.
An angled perspective shot of the CL220 digital clamp meter against a white background. The image showcases the ergonomic side trigger for the 1.6-inch jaw opening, the high-visibility industrial housing, and the integrated test lead holder on the side of the meter for convenient storage.
Clamp meter with orange handle on a white background
Digital multimeter with probes on a white background
Action shot of a technician using the CL220 to measure AC current in a residential HVAC unit. The clamp jaw is shown encircling a live wire, while the high-contrast backlit LCD provides a clear real-time reading of the electrical draw in a dimly lit mechanical environment.
Action shot showing the CL220 being used to verify voltage at a standard electrical outlet. A technician, wearing protective gear, uses the included test leads to monitor real-time AC voltage data, demonstrating the tool's effectiveness for circuit troubleshooting and safety certification.
Person wearing black gloves using a digital multimeter with orange clamps on electrical equipment.
Klein Tools Clamp Meter Family promotional how to video
A direct front studio shot of the Klein Tools CL220 HVAC clamp meter. The professional-grade orange and black device features a 400A AC current jaw with an integrated non-contact voltage tester, a high-visibility backlit digital LCD, a multi-function rotary dial, and dedicated buttons for data hold and max value capture.
A technical infographic for the CL220 HVAC clamp meter highlighting its primary sensing capabilities. Text callouts identify the 400A AC current measurement via the clamp jaw, AC/DC voltage and resistance testing via leads, and temperature measurement using the included thermocouple probe.
An angled perspective shot of the CL220 digital clamp meter against a white background. The image showcases the ergonomic side trigger for the 1.6-inch jaw opening, the high-visibility industrial housing, and the integrated test lead holder on the side of the meter for convenient storage.
An angled perspective shot of the CL220 digital clamp meter against a white background. The image showcases the ergonomic side trigger for the 1.6-inch jaw opening, the high-visibility industrial housing, and the integrated test lead holder on the side of the meter for convenient storage.
Clamp meter with orange handle on a white background
Digital multimeter with probes on a white background
Action shot of a technician using the CL220 to measure AC current in a residential HVAC unit. The clamp jaw is shown encircling a live wire, while the high-contrast backlit LCD provides a clear real-time reading of the electrical draw in a dimly lit mechanical environment.
Action shot showing the CL220 being used to verify voltage at a standard electrical outlet. A technician, wearing protective gear, uses the included test leads to monitor real-time AC voltage data, demonstrating the tool's effectiveness for circuit troubleshooting and safety certification.
Person wearing black gloves using a digital multimeter with orange clamps on electrical equipment.
Klein Tools Clamp Meter Family promotional how to video
KLEIN TOOLS

Klein Tools Clamp Meter CL220 400A AC Auto Ranging Multimeter (Voltage Resistance Temperature Non Contact Detection HVAC Maintenance Diagnostic Tool)

Only 2 left
SKU: CL220
$74.97 USD

Description

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Audit Blower Motor Draw and Measure Refrigerant Loop Temperatures Instantly with Solid State True RMS Balancing Logic

The Klein Tools CL220 is an automatically ranging True RMS digital clamp multimeter engineered for the direct measurement of electrical current up to 400A AC and line potential up to 600V AC/DC. This field test instrument delivers precision diagnostic data across wave-distorted mechanical loads to prevent structural equipment failure inside residential and light industrial environments. Operating within a certified CAT III 600V safety envelope, the meter integrates an interior jaw-mounted non-contact voltage sensor alongside a K-Type thermocouple port to execute complete systemic efficiency evaluations inside dark climate infrastructure enclosures.

Best Used For:

  • Blower Motor Diagnostics: Measuring running alternating current amp draw profiles up to 400A directly on climate handler wiring legs to identify inductive load anomalies.
  • Thermal Line Balancing: Recording real-time heating and cooling circuit temperatures with the included K-Type thermocouple probe to optimize fluid heat transfers.
  • Pathway Isolation Checks: Evaluating solid-state control boards and component pathways up to 20MΩ to pinpoint open circuits or failing safety relays.

Key Performance & Safety Features

  • True RMS Measurement: Automatic ranging TRMS processing engine strips away electrical background noise to preserve metric data integrity.
  • Jaw-Embedded Safety Tester: Non-contact voltage module positioned inside the 1.6-inch clamp assembly runs instant wire checks before lead connection.
  • Broad Temperature Framework: Thermocouple processing circuitry registers structural system thermal outputs stretching from -40°F to 1832°F.
  • Backlit Data Screen: High-visibility digital LCD interface populates illuminated character blocks to clear workspace viewing obstructions.
  • Rugged Double Insulation: Hardened impact-resistant framework shell passes jobsite concrete drop tests from structural positions up to 6.6 feet.

What's Included

  • CL220 Digital TRMS Clamp Meter
  • Set of Test Leads with CAT III/CAT IV Safety Caps
  • K-Type Thermocouple Probe
  • Three AAA Batteries
  • Soft Carrying Case
  • Instruction Manual

Technical Specifications

Maximum Alternating Current: 400A AC
Maximum Monitored Voltage: 600V AC / 600V DC
Thermal Monitored Scale: -40° to 1832°F
Clamp Jaw Opening Span: 1.6 in.
Industrial Safety Rating: CAT III 600V, Class 2 Double Insulated
Maximum Loop Resistance: 20MΩ
Chassis Impact Protection: 6.6 ft. (2 m)
Display Interface Profile: Backlit High-Visibility LCD
Power Source Requirements: 3 x AAA Batteries
Tester Chassis Length: 8.45 in.
Tester Chassis Width: 3.5 in.
Tester Chassis Height: 1.5 in.
Net Diagnostic Weight: 13.4 oz.
Pro-Tip: When capturing current on standard unshielded thermostat bundles, clip the clamp jaw cleanly around only a single conductor wire; looping multi-conductor supply lines together will cause field cancellations and report false zero values.