Extech Clamp Meter 400A AC DC Power - 380940

In stock

This clamp meter measures current, voltage, frequency and calculates the True Power. With current measurements up to 400A and AC voltage up to 600V. Also measures DC voltage to 400V.

Extech Clamp Meter 400A AC DC Power - 380940

This versatile meter measures True Power, Current and Voltage


  • True RMS AC Voltage and Current
  • 0.9” (23mm) jaw opening
  • Large 4000 count LCD display
  • Fast 40 segment analog bar graph
  • Data Hold, Max/Min recall, Auto Zero (DC current), plus low battery indication
  • Frequency to 10kHz
  • Auto power off
  • Complete with test leads, 2 AA batteries and a carrying case

A clamp meter is a fast, safe and accurate way to test the current flowing through a conductor. This particular meter features a current measurement capability up to 400A and also features the ability to measure True RMS AC Voltage. True Power calculations are also included, being able to measure up to 240kW with a 10W resolution.

This clamp meter is part Multimeter with the ability to measure voltage, current and frequency with the added calculated kilowatts. A great tool for electricians and engineers as well as anyone wishing to test their home electrical systems for efficiency. The 380940 Clamp Meter User Manual is attached to this page to answer any further questions.


  • AC Power Range: 40kW, 240kW
  • AC Power Resolution: 10W, 100W
  • DC Power Range: 40kW, 240kW
  • DC Power Resolution: 10W, 100W
  • AC Current Range: 400A
  • AC Current Resolution: 0.1A
  • DC Current Range: 400A
  • DC Current Resolution: 0.1A
  • AC Voltage Range: 600V
  • AC Voltage Resolution: 1V
  • DC Voltage Range: 400V
  • DC Voltage Resolution: 0.1V
  • Frequency 10kHz
  • Dimensions 7.2 x 2.5 x 1.4" (183 x 64 x 36mm)
  • Weight 6.7oz (190g including batteries)

Unit Ship Weight: 1.5 lbs

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