For all your test equipment requirements

Extech EX840 Clamp Meter and IR Thermometer

Extech logo

The rugged Extech EX840 1000A AC/DC CAT IV clamp meter is designed to deliver safety and versatility — without compromising performance or innovation. You can take the EX840 on the job to leverage its advanced meter functions including True RMS AC/DC current and voltage, resistance, capacitance, frequency, infrared and contact temperature, diode-test, and continuity check. Use the EX840’s fast-responding peak hold function to capture inrush currents and transients.

Authorised Australian Distributor

CE   UL   CAT III   CAT IV   3 Years


If you would like more information regarding this product, simply email us here.
  • This field is for validation purposes and should be left unchanged.
SKU: Extech EX840 Category: Tags: ,

Extech EX840  Features:

  • 1000 AC/DC Clamp
  • True RMS, Autoranging
  • Built-in infrared thermometer
  • Hold, maximum/minimum
  • Relative data functions
  • Thermocouple temperature
  • 43mm jaw opening

Extech EX840 Overview

The EX840 amp clamp has a CAT IV-600-volt, CAT III-1000V overvoltage safety rating and is CE and ETL approved. In addition to being able to take temperature measurements using the Type K wire probe, the EX840 enables users to take safe, point-and-shoot, non-contact temperature measurements with an integrated infrared (IR) thermometer that packs a useful 8:1 distance ratio. That means that at a safe distance of 8 inches users are getting a temperature reading focused on a tight, one-inch spot. The built-in IR thermometer makes it easier for users to identify overheating motors, stressed bearings, overloaded electrical panels, abnormal vent temperatures, and other components from a distance — and without an additional meter.

Other Features

The bright 4-digit, 4,000 count backlit display is complemented by several one-button functions including Data Hold, Min/Max, and selectable auto- or manual-ranging. The large 43mm jaw opening handles conductors up to 750 MCM or multiple conductors such as two 500 MCM.

Extech EX840 Specifications

Specifications Range Basic Accuracy
AC Current 0.1 to 1000A ±2.8%
DC Current 0.1 to 1000A ±2.8%
AC Voltage 0.1mV to 1000V ±1.5%
DC Voltage 0.1mV to 1000V ±2.8%
Resistance 0.1 to 40MΩ ±1.5%
Capacitance 0.001nF to 40,000µF ±3.0%
Frequency 0.001kHz to 4kHz ±1.5%
IR Temperature -50 to 270ºC ±2.0% rdg or ±2ºC
Type K Temperature -20 to 760ºC ±(3%rdg+5ºC)
Continuity YES
Inrush YES
Diode YES
Dimensions 270 x 110 x 50mm
Weight 386g



There are no reviews yet.

Be the first to review “Extech EX840 Clamp Meter and IR Thermometer”