Extech MA445: 400A True RMS AC/DC Clamp Meter + NCV

SKU: 01MA445

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  • Regular price $104.95

Clamp Meter with Non-Contact Voltage Detector and Type K

Three models to choose from, with or without True RMS and AC or AC/DC Current functions. Choose True RMS model for accurate readings of non-sinusoidal waveforms, model with DC Current function for automotive applications, or model with Type K function when applications require Temperature measurements. The MA440 Series meters are fully loaded with multimeter functions and built-in non-contact voltage (NCV) detector to meet your application needs!


Key Features

  • True RMS feature for accurate readings regardless of waveforms
  • 1.2" (30mm) jaw size fits conductors up to 500MCM
  • Built-In Non-Contact Voltage Detector (NCV)
  • Large backlit LCD display and built-in Flashlight
  • Functions include: NCV, AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Type-K Temperature, Diode Test, Continuity
  • Relative mode for Capacitance, DC Zero and Offset Adjustment, Data Hold, Max/Min, Auto Power Off and Low Battery Indicator
  • Complete with test leads, three AAA batteries, general purpose Type K temperature probe and pouch


Specifications Range (Max. Resolution)
AC Current 400.0A (10mA) True RMS
DC Current 400.0A (10mA)
Basic Current Accuracy AC: ±2.5%, DC: ±2.0%
DC Voltage 600V (0.1mV) True RMS
AC Voltage 600V (1mV)
Basic Voltage Accuracy AC: ±1.2% DC: ±0.8%
Non-Contact Voltage (NCV) 100 to 600V
Resistance 40MΩ (0.1Ω)
Capacitance 40mF (0.01nF)
Frequency 1MHz (0.01Hz)
Temperature (Type K - meter range) -40° to 1832°F/-40° to 1000°C (1°)
Duty Cycle Yes
Diode/Continuity Yes
Dimensions 9x3x1.6" (228x77x41mm)
Weight 9.3oz (265g)