Catalog No. 411 - AC Current Probe

Cat. 411 AC Current Probe
Cat. 411 AC Current Probe

The TESCO AC Current Probe (Catalog No. 411) is designed to extend current measuring capabilities of the CT Ratio/Burden Tester (Catalog No. 1047). Cat. 411 is built to the latest safety and performance standards, including the CE Mark. Two different hook-shaped jaws are offered, both permitting the user to “pry” or “hook” onto cables (will accept 2 x 500MCM) or even onto small bus bars.

The AC Current Probe uses hall effect technology to measure AC current. The electronics and batteries are self-contained in the handles. The output of the AC Probe is 1mV/A and 10mV/A. The Current Probe measures to 400A AC.

TESCO’s Cat. 411 can be sold as is, or as a calibrated item by our ISO 17025 Testing and Calibration Laboratory.


  • Measurement range of 400A AC
  • Distinct jaw shapes to be used for hooking or prying around the conductor
  • Auto-zero push button
  • Auto off after 10 minutes
  • Conforms to EN 61010, 600V, CAT III safety standard
  • Low phase shift for power measurements
  • mV output signals
  • Double insulation
  • CE Mark

Equipment Documentation


Nominal Range
400A AC
Measurement Range
0.2 to 600A
Output Signal: 60A
10mV/A; 600A: 1mV/A
Accuracy (60A Range)
0.5 to 40A: 1.5% of Reading +/-0.5A
Phase Shift (60A Range)
10 to 20A: 45 to 65Hz: ≤3.5°
20 to 40A: ≤3°
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