Klein Tools CL800 Digital Clamp Meter – Auto-Ranging TRMS, LoZ, 1000V

Overview

The Klein Tools CL800 Digital Clamp Meter is an automatically ranging true RMS instrument designed with electricians in mind. It combines clamp-on current measurement with comprehensive voltage, resistance, and continuity testing in a single handheld tool. The built-in thermocouple lets you monitor temperature, while the LoZ (Low Impedance) mode helps distinguish real voltages from ghost or stray readings on noisy circuits.

What makes the CL800 especially practical is how it streamlines workflow on real job sites. You can clamp to measure AC or DC current without breaking a circuit, and you can switch to test leads for precise measurements of voltage, resistance, frequency, capacitance, and diode behavior. The display is readable even in dim environments, thanks to a backlit LCD, and you get a handy worklight to illuminate your work area when light is scarce.

What it measures

• AC voltage and current (via clamp) and DC voltage
• Non-contact voltage testing (NCVT) via the clamp
• Resistance, continuity, and diode test via probes
• Frequency and duty cycle, capacitance, and temperature with thermocouple

Key jobsite features

• LoZ mode helps identify ghost voltages on complex circuits
• Backlit display improves readability in low-light spaces
• Integrated worklight and side lead holder support efficient workflow
• Optional magnetic hanger enables hands-free operation when needed
• Rugged build with IP40 protection and 6.6 ft (2 m) drop resistance

In the box

• Carrying case and test leads with CAT III/CAT IV safety caps
• Thermocouple for temperature measurements
• Instructions and 2 x AAA batteries

Designed to be a reliable companion for electrical tasks, the CL800 emphasizes precision, durability, and practical features that fit into everyday field work. It’s a tool that supports thorough testing and informed troubleshooting without overpromising outcomes.