Klein Tools CL490 400A TRMS Clamp Meter is a professional digital clamp meter developed for electrical maintenance, HVAC service, panel inspection, field troubleshooting, and industrial measurement applications. With auto-ranging True RMS measurement technology, it delivers accurate and reliable readings across different electrical loads. The device measures up to 400A AC/DC current and detects non-contact voltage through the clamp, while the test leads allow measurement of 600V AC/DC voltage, resistance, continuity, frequency, duty cycle, capacitance, DC microamps, and diode testing. With a thermocouple probe, it can measure temperature from -40°C to 1000°C / -40°F to 1832°F. Its dual-display design makes readings easier to view, especially in tight and hard-to-access areas. The backlit reverse-contrast LCD screens provide clear visibility in both dark and bright environments. Integrated non-contact voltage detection in the clamp jaw provides safer operation with audible and visual indicators that intensify as the meter approaches a voltage source. With a 2-meter drop-protected body, CAT III 600V safety rating, ergonomic design, test lead holder, and compatibility with an optional magnetic hanger, the Klein Tools CL490 is a reliable, compact, and versatile measurement solution for electricians, HVAC technicians, maintenance teams, and field personnel.

Product Features

• Dual-display digital clamp meter allows users to view readings even in tight spaces.
• True RMS AC/DC clamp meter provides accurate and reliable measurements across a wide range of applications.
• Measures AC/DC current and NCVT through the clamp; measures AC/DC voltage, resistance, continuity, frequency/duty cycle, DC microamps, diode test, and capacitance through the test leads; measures temperature with a thermocouple.
• Backlit reverse-contrast LCD displays provide clear data and optimal visibility in all environments.
• Drop-protected up to 2 meters and includes right-angle input test leads, thermocouple, storage pouch, instruction manual, and 2 AA batteries.
• Ergonomic design provides a comfortable grip with easy thumb-operated dial adjustment.
• Non-contact voltage detection is integrated into the clamp jaw and features audible and visual indicators that intensify as the clamp approaches the voltage source.
• Clamp body includes a side-mounted test lead holder and a rear mount for attaching an optional magnetic hanger, 69445 or 69417, for hands-free use.