Klein Tools ET600 Multimeter & Megohmmeter Insulation Tester | 4000 MΩ, 1000 V Auto-Ranging TRMS

Overview

The Klein Tools ET600 combines insulation testing with precise electrical measurements in a single, field-ready instrument. Designed for professionals who evaluate insulation integrity and voltage conditions, this device supports high-visibility results in challenging environments. Its compact form hides a robust feature set that helps technicians diagnose issues quickly and move on to the next task with confidence.

Whether you’re testing insulation resistance, checking AC or DC voltages, or validating continuity, the ET600 is built to deliver reliable readings when you need them most. Klein Tools remains committed to quality, with six generations of craftsmanship shaping every tool. This heritage underpins the ET600’s durable construction and thoughtful ergonomics, designed to hold up under daily field use and long shifts in demanding job sites.

Key capabilities at a glance

• INSULATION RESISTANCE TESTING up to 4000 MΩ at 125 V, 250 V, 500 V, and 1000 V DC, enabling thorough insulation diagnostics
• VOLTAGE MEASUREMENTS up to 1000 V AC/DC, with automatic ranging for simplified setup
• VERSATILE TESTING: resistance and continuity checks broaden your measurement toolkit in one device

In practice, technicians can verify insulation integrity on cables, cables bundles, motor windings, and panels, while also validating live voltage conditions before maintenance or installation work. The ET600’s automatic ranging True RMS (TRMS) technology contributes to more consistent results across different signal shapes, enabling more reliable comparisons over time.

User-friendly design for real-world jobs

• Simple operation with dedicated test and lock buttons for quick, repeatable measurements
• Backlit dual display with a bar graph enhances readability in dim workspaces
• Built-in stand and hands-free operation support placement and stability during testing
• Auto-power off, Max/Min and Hold functions help you capture and review results at a glance

Safety and maintenance are straightforward thanks to a dedicated voltage warning icon, a clear high-voltage indicator, and a replaceable battery and fuse. These thoughtful touches reduce downtime and keep your workflow smooth on busy job sites.

Why technicians choose the ET600

• TRMS accuracy improves reliability across a range of signal types
• Clear, readable displays under varied lighting conditions
• Integrated features that support quick diagnostics without switching tools

As a long-standing tool from a family-owned American brand, the ET600 embodies a balance of performance, durability, and value for professional electricians, technicians, and inspectors who rely on precise measurements daily. It’s designed to be part of a trusted toolkit that you can return to for years of service.