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Extech EX840: 1000A AC/DC True RMS Clamp/DMM + IR Thermometer

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Extech CAT IV 1000A Clamp Meter + IR Thermometer

Availability: In stock




Industrial Clamp-on multimeter with CAT IV-600V safety rating ideal for industrial applications, this full-size True RMS 1000A AC/DC Clamp features a built-in Infared Thermometer and rugged double molded housing.

EX840 CAT IV Clamp Meter Features:

  • Built-in non-contact IR Thermometer with laser pointer
  • True RMS Current and Voltage measurements
  • Peak hold captures inrush currents and Transients
  • MultiMeter functions include AC/DC Voltage, Resistance, Capacitance, Frequency, Diode, and Continuity
  • 1.7" (43mm) jaw opening for conductors up to 750MCM or two 500MCM
  • 4000 count backlit display
  • Features include Data Hold and Min/Max and Auto Power off
  • Autoranging with manual range button
  • Complete with CAT IV test leads, 9V battery, general purpose Type K probe, pouch case, and Professional Test Lead Set
  • Optional: *NISTL - Limited NIST for Certificate of Traceability to all functions except IR Thermometer

CAT IV -600V safety rating for added protection and True RMS feature gives you accurate readings of non-sinusoidal waveforms.

Built-in IR Thermometer with laser pointer is an excellent troubleshooter for locating hot spots and overheating motors.

Professional Test Lead Features:

  • 8-Piece Professional Test Lead set
  • Two 42" (1m) PVC lead extensions with shrouded banana plugs at both ends
  • Two modular 4" (102mm) Heavy Duty test probe handles with 0.16" (4mm) banana plug tip
  • Two standard size, alligator clips with insulated rubber boot
  • Two extra large, double-insulated, alligator clips with sharp teeth for piercing insulated wire. Jaws open to 0.8" (20mm)


Pouch case to store the meter, temperature probe, and test leads. The additional 8pc set Professional Test Leads are packaged separately.

Additional Info

Additional Info

Model MS-EX840
Set Product as New to Date No
  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 -58 to 518ºF (-50 to 270ºC) ±2.0% rdg or ±4ºF/±2ºC
Type K Temperature -4 to 1400ºF (-20 to 760ºC) ±(3%rdg+9°F/5ºC)
Continuity YES
Inrush YES
Diode YES
Dimensions 10.6x4.3x2" (270x110x50mm)
Weight 13.6oz (386g)
Clamp Meter Type AC/DC Clamp Meters
Manufacturer Warranty 3 Years
Mfr. Model # EX840
Usually Ships 3 to 7 days
Standards CE Approved


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