EXTECH EX655-NIST, 600A True RMS AC/DC Clamp Meter and NCV with NIST


Price $289.99
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Extech Test & Measurement

AC Clamp Meter with Non-Contact Voltage Detector and Low Impedance with NIST

The EX655 is a 600A True RMS AC/DC Clamp meter. This clamp meter also measures AC/DC voltage, resistance, capacitance, frequency, temperature, continuity/diode test and has an NCV detector. The EX655 has a 1.18" jaw size which accommodates conductors up to 350 MCM. This meter also features a 6000 count backlit LCD display, data hold, min/max, relative function,low pass filter, inrush mode, DC zero function, LCD trending bargraph, auto power off and a convenient LED worklight. Complete with test leads general purpose bead wire Temperature probe, and 3 AAA batteries.


  • True RMS for accurate AC measurements
  • 1.18" (30mm) jaw size accommodates conductors up to 350MCM
  • 6000 count backlit LCD display with bargraph
  • Low Impedance (LoZ) prevents false reading caused by ghost voltages
  • Low Pass Filter (LPF) for accurate measurements of variable frequency drive signals
  • Built-in non-contact voltage detector (NCV) with LED indicator
  • Built-in LED flashlight for working in dimly-lit areas
  • Functions include: NCV, AC/DC Voltage, AC/DC Current, AC/DC micro Current, Resistance, Capacitance, Frequency, Type-K Temperature, Diode Test, Continuity
  • DC Zero mode, Data Hold, Min/Max, Relative function, Auto Power Off
  • Inrush mode captures current surges during motor startup
  • Complete with test leads, 3 AAA batteries and general purpose bead wire temperature probe


  • AC Current (Max Res.): 60A, 600A (0.01A)
  • DC Current: 60A ,600A (0.01A)
  • Basic accuracy:
    • ACA: ±2.5% of rdg;
    • DCA: ±2.5% of rdg
  • AC/DC µA Current (Max Res.): 600µA (0.1µA)
  • DC Voltage (Max Res.): 1000V (0.1mV)
  • AC Voltage (Max Res.): 750V (1mV)
  • Basic Accuracy:
    • ACV: ±1.2% of rdg;
    • DCV: ±0.8% of rdg
  • Non-Contact Voltage (NCV): 100 to 1000V
  • Resistance (Max Res.): 60MΩ (0.1Ω)
  • Capacitance (Max Res.): 60mF (0.01nF)
  • Frequency (Max Res.): 10Hz to 1MHz (0.01Hz)
  • Temperature (Max Res.):
    • -40 to 1832°F (1°F);
    • -40 to 1000°C (1°C)
  • Continuity Beeper: Yes
  • Diode Test: Yes
  • Dimensions: 9x3x1.6" (228x77x41mm)
  • Weight: 9.4oz (265g)