Extech MA445 400A True RMS AC/DC Clamp Meter with NCV Detector, 1.2" Jaw Opening, Backlit Dual Display, 40,000 Count Multimeter, Inrush Current, Frequency, Duty Cycle, Diode & Continuity Tester

The Extech MA445 400A True RMS AC/DC Clamp Meter is built for electricians, HVAC technicians, and maintenance pros who need accurate, all-in-one measurement capability. With a 400A True RMS capacity, it delivers precision even in noisy electrical systems where average-sensing meters fall short. Equipped with a non-contact voltage detector, the MA445 makes it simple to spot live circuits safely. Its backlit dual 40,000-count display allows you to view multiple measurements at once—perfect for low-light job sites. Beyond current and voltage, this versatile clamp meter also offers inrush current capture, frequency, duty cycle, diode, and continuity tests, consolidating multiple tools into one rugged device. With a 1.2-inch jaw opening to accommodate large conductors and durable construction designed for demanding field work, the Extech MA445 is the go-to clamp meter for professionals seeking accuracy, versatility, and confidence on the job.

• 400A True RMS Accuracy - Reliably measure AC and DC current up to 400 amps with True RMS precision, giving professionals dependable results even in noisy electrical environments.
• Non-Contact Voltage Detection - Quickly identify live wires with the built-in NCV detector, offering an added layer of safety when working in panels, outlets, or industrial systems.
• Backlit Dual Display - Large 40,000-count display with bright backlight shows both primary and secondary readings, making data easy to read even in dimly lit job sites.
• Versatile Test Functions - Includes inrush current capture, frequency, duty cycle, diode, and continuity testing, giving you a complete multimeter in a convenient clamp design.
• Durable & Professional Design - Compact body with 1.2-inch jaw opening accommodates thick conductors, while rugged construction ensures reliability in demanding field conditions.