Klein Tools CL490 AC/DC Digital Clamp Meter with TRMS, Dual Displays, Auto-Ranging

Overview

The Klein Tools CL490 is a premium, auto-ranging clamp meter designed to handle a wide range of electrical testing tasks with confidence. Its True RMS (TRMS) processing helps deliver consistent readings across changing signal shapes, while a dual-display setup keeps essential data visible in tight spaces. Built for professional use, this meter emphasizes accuracy, reliability, and practical convenience in demanding environments.

What it Measures and How

This versatile tool can read AC and DC current and voltage, along with resistance, continuity, frequency, and capacitance. It also covers DC microamps, diode tests, and temperature measurements via a thermocouple. A standout feature is NCVT detection with audio-visual alerts, aiding quick safety checks without constant screen monitoring. The device supports auto-ranging for fast setup and reduces the guesswork when you’re on the clock.

• AC/DC current and voltage with TRMS accuracy for complex waveforms
• Resistance, continuity, and diode testing for circuit verification
• Frequency and capacitance measurements to gauge circuit timing and storage characteristics
• DC microamps measurement for precision on small signals
• Temperature readouts via thermocouple input for thermal monitoring
• NCVT detection with audible and visual alerts for safer checks

Designed for Real-World Use

In everyday trades and field service, the CL490 shines where space is tight and lighting varies. A backlit, reverse-contrast LCD improves legibility in dim environments, while two displays offer ongoing visibility of a second parameter without flipping screens. The test lead holder on the back and an optional magnetic hanger make hands-free operation practical when you’re climbing ladders or working inside panels.

• High-visibility dual screens for simultaneous data viewing
• Backlit reverse-contrast display for clear readings in low light
• Test lead holder and optional magnetic hanger for hands-free use
• Auto-ranging with TRMS accuracy to speed up measurement tasks
• NCVT detection provides extra assurance during voltage checks
• Rugged, professional-grade design from a brand with a long heritage

Why Pick the CL490

Beyond raw measurements, this meter represents a practical toolkit for professionals who value precision and ease of use. Its combination of dual displays, robust measurement suite, and safety features contributes to a smoother workflow on busy job sites. While results will vary with each application, the CL490 offers possibilities for deeper insight—whether you’re diagnosing a circuit, validating component performance, or verifying safety limits in real time. Klein Tools brings decades of experience to a tool designed to be dependable, ergonomic, and ready for the next job.