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 All Categories    Model MA640 Clamp Meter - Extech
Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
All Categories > Test Equipment > Extech Clamp Meters > Model MA640 Clamp Meter - Extech > Item # MA640  
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Item # MA640, Model MA640 Clamp Meter - Extech

MA640 Clamp Meters

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600A True RMS Clamp Meters + Non-Contact Voltage Detect
  • TRMS AC Voltage & Current measurements
  • Non-contact Voltage detector with LED alert
  • DC Voltage, DC Current, Resistance, Capacitance, Frequency, Temperature, Duty Cycle
  • Relative Mode for Capacitance Zero and Offset Adjustment
  • Data Hold and MIN/MAX
  • Complete with test leads, Type K bead wire probe, 9V battery and carrying case


AC Sensing


Display Counts


Jaw Size/ Cable Size

1.5 in (40mm)

AC Current

60A, 600A

DC Current

60A, 600A

Max Resolution


Basic AC/DC Accuracy


AC/DC Voltage (Max. Res.)

AC: 600V (1mV)
DC: 600V (0.01mV)

Resistance (Max Res.)

60Mohm (0.1ohm)

Capacitance (Max Res.)

4000µF (0.01nF)

Frequency (Max. Res.)

10kHz (0.01Hz)

Temperatures (Type K)

-4 to 1400 ºF



Data Hold




Safety Rating



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