If you want to measure AC or DC current ... An opamp circuit provides a gain of 100 to boost the hall effect sensor’s output. In addition to building a homebrew probe, the video also shows ...

SENSEPEEK SQG-series passive high-frequency hands-free oscilloscope probes are designed for both ac and dc GHz applications. When used with firm’s baseplates ...

There was no load resistance either, which is unlikely. Even an oscilloscope probe will load the circuit a little. The resulting AC analysis showed a nice filter response that was flat to about 1 ...