Extech EX420
Autoranging Digital MultiMeter with Temperature Function

  • Averaging DMM with 11 functions and 0.3% basic accuracy
  • AC/DC Voltage & Current, Resistance, Capacitance, Frequency, Temperature, Diode/Continuity, Duty Cycle
  • Input fuse protection and mis-connection warning
  • 20A max Current
  • Type K temperature measurements
  • Data hold, Relative, Auto power off
  • Large-digit backlit LCD
  • Available in alternate configurations:
    • EX410 - Manual Ranging, Type K Temperature
    • EX411 - Manual Ranging, True RMS, Type K Temperature
    • EX430 - Autoranging, True RMS, Capacitance, Frequency, Type K Temperature
    • EX450 - Autoranging, IR Temperature
    • EX470 - Autoranging, Type K & IR Temperature, True RMS, Capacitance, Frequency
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Extech EX420
Product Information
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Basic Accuracy (VDC) ±0.3%
AC Voltage 1mV to 750V
DC Voltage 0.1mV to 1000V
AC Current 0.1mA to 20A
DC Current 0.1μA to 20A
Resistance 0.1Ω to 20MΩ
Temperature (Type K) -4 to 1382°F
(-20 to 750°C)
Capacitance 0.01nF to 100μF
Frequency 0.001Hz to 10MHz
Duty Cycle 0.1% to 99.9%
Continuity / Diode yes
Warranty 1 year
Ordering Information
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Optional Configurations
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Included Accessories
  • 1 - Set of CAT III Test Leads
  • 1 - Tilt stand
  • 1 - Protective holster
  • 1 - Velcro hanging strap
  • 1 - Type K bead wire temp probe
  • 1 - 9V battery
Optional Accessories
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*NOTE: Items ordered with optional NIST calibration will require
approximately 10 days to complete the certification.