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The MR521 is a general purpose 1500A AC or DC current probe designed for use with AstroNova recorders and data acquisition systems.


  • Nominal Range: 100Aac / 150Adc & 1000Aac / 1500Adc
  • Measurement Range: 0.2 to 1500A
  • Output Signal: 150A: 10mV/A 1500A: 1mV/A
  • Accuracy: Range dependent. See datasheet for details.
  • Frequency Range: DC to 10 kHz @-3dB
  • Max. Conductor Size: One 1.5-inch (39mm), or two 0.95-inch (24mm), or two bus bars 1.96 x 0.19-inch (50 x 5mm) or one bus bar 1.96 x 0.49-inch (50 x 12.5mm)
  • Portable Operation Rating: Approximately 50 hours with 9V alkaline battery
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