Klein Tools Clamp Meter CL120 400A AC Auto Ranging Multimeter (600V AC DC Tester 20M Ohm Backlit LCD 1.6 Inch Jaw Circuit Diagnostics Test Leads)

Verify Alternate Current Amperage and Trace Live Circuit Nodes Instantly with Heavy Duty Non Contact Clamp Detection

The Klein Tools CL120 is an automatically ranging digital clamp multimeter engineered for direct diagnostic verification of current up to 400A AC and line potential up to 600V AC/DC. This field test instrument tracks structural load consumption profiles across residential and light industrial environments without opening structural conductor pathways. Operating within a certified CAT III 600V safety envelope, the device integrates an interior jaw-mounted non-contact voltage sensor alongside a 20MΩ resistance track to execute complete branch monitoring and continuity audits inside dark mechanical closets.

Best Used For:

• Blower Motor Audits: Clamping the spring jaw assembly over unshielded HVAC fan power supply lines to measure active operational alternate current draw.
• Junction Box Sweeps: Running the integrated induction sensing head along bundled branch circuit runs to isolate live conductors without exposed wire contact.
• Control Loop Diagnostics: Utilizing the premium test lead set to verify low-voltage transformer outputs, relay switches, and micro-terminal pathway resistance.

Key Performance & Safety Features

• Auto-Ranging Processing Core: Automated scale tracking microcircuits select optimal parameters matching active line metrics to ensure quick readings.
• Jaw-Embedded Safety Sensor: Non-contact alternate current voltage tracing block inside the 1.6-inch jaw performs instant pre-test panel checks.
• Illuminated Data Interface: Clear 2000-count backlit LCD screen displays high-contrast characters to bypass physical lighting barriers in tight staging areas.
• Double-Insulated Framework: Hardened impact casing passes structural jobsite validation drop test protocols on solid concrete surfaces from up to 6.6 feet.
• Automated Power Management: Integrated firmware triggers a complete safety shutdown after ten minutes of inactivity to defend internal battery cell health.

What's Included

• CL120 Digital Clamp Meter
• Set of Test Leads with CAT III/CAT IV Safety Caps
• Soft Carrying Case
• Three AAA Alkaline Batteries
• Instruction Manual

Technical Specifications

Pro-Tip: When capturing active lines with your hook assembly, lock only one single conductor inside the 1.6-inch tracking jaw; running grouped multi-wire utility ropes cancels out magnetic line patterns and outputs a false zero reading.