Klein Tools CL445 HVAC Clamp Meter | Auto-Ranging TRMS, NCVT & More

The Klein Tools CL445 HVAC Clamp Meter combines advanced measuring power with field-ready practicality. Auto-ranging True RMS technology helps you capture precise readings in challenging environments, while the clamp design lets you measure current and inrush without breaking circuits. The built-in test leads expand your measurement options to voltage, resistance, diodes, and more, making it a versatile companion for HVAC diagnostics.

Beyond voltage and current, this meter covers a wide range of parameters: AC current, inrush current, AC and DC voltage, DC microamps, resistance, continuity, frequency and duty cycle, capacitance, diodes, and temperature via the included K-Type thermocouple. A non-contact voltage tester is integrated into the clamp jaw for quick live checks, and the backlit dual-display shows voltage and current at the same time for easy readings in dim spaces. Its slim clamp jaw and ergonomic design help you maneuver in tight panels, while the optional magnet hanger and test-lead accessories support hands-free operation when appropriate.

Key capabilities and practical benefits

• Auto-ranging True RMS technology provides reliable results across a variety of signals
• Integrated non-contact voltage testing enables quick, safe electrical checks
• Backlit LCD with dual-display shows voltage and current simultaneously for clear readings
• Simultaneous measurement of multiple parameters with test leads (voltage, resistance, diodes, capacitance, etc.)
• Temperature measurement via K-Type thermocouple for HVAC component assessment

Designed for the field

• Max/Min, Inrush, and Data Hold features capture peak values and trends
• Conformal versatility: right-angle input test leads, push-on alligator clips, and a compact, slim jaw
• Worklight aids visibility in cramped or dark spaces, improving readability
• Auto-power-off helps conserve battery life during long shifts
• Complete package includes carrying case, safety-rated test leads with CAT caps, thermocouple, and batteries

With a legacy of quality and precision going back over 160 years, Klein Tools designs tools to endure demanding professional use. The CL445 is built to be dependable day after day, combining robust construction with a thoughtful set of features that align with HVAC workflows. This is a tool you can rely on when your job hinges on accurate, timely measurements.