Klein Tools Auto-Ranging Digital Multimeter 600V

Model Number: MM420

The Klein Tools MM420 Auto-Ranging Digital Multimeter is a versatile electrical testing tool designed for electricians, HVAC technicians, maintenance professionals, and advanced DIY users. Built with True RMS technology, it delivers accurate readings on both standard and non-linear electrical signals, making it ideal for diagnosing and troubleshooting electrical systems in residential, commercial, and industrial environments.

The MM420 measures up to 600V AC/DC voltage, 10A AC/DC current, and resistance, while also offering additional testing capabilities including continuity, diode testing, capacitance, frequency, duty cycle, and temperature measurement. Its auto-ranging functionality automatically selects the appropriate measurement range, helping users work faster while reducing setup time and improving measurement accuracy.

Designed for real-world jobsite conditions, the MM420 features a large backlit LCD display for easy viewing in dimly lit spaces and a durable housing built to withstand daily use. With its combination of advanced testing functions, user-friendly operation, and dependable construction, this multimeter is a reliable tool for routine electrical maintenance, diagnostics, and system verification.

Specifications:

• True RMS technology for accurate readings on complex electrical signals
• Measures AC/DC voltage up to 600V
• Tests AC/DC current up to 10A
• Resistance measurement up to 50MΩ
• Additional functions include temperature, capacitance, frequency, duty cycle, continuity, and diode testing
• Auto-ranging operation for faster, easier measurements
• Backlit display for improved visibility in dim workspaces
• Lead-alert safety indicators for proper lead placement
• Rugged design built for professional jobsite use