A non-contact current probe is an instrument that can detect the magnetic field generated by an electric current, displaying the current value on an attached instrument, such as a multimeter or an oscilloscope.
Most non-contact current probes are expensive, but a YouTube researcher has found one that costs under $200.
It has three ranges (4 A, 40 A and 400 A), a resolution of 10mA and a bandwidth of 200kHz, and it runs off a 9V battery.
Internally, the device is merely an analog device with a hall-effect sensor, some adjustment pots and an op-amp, with nothing in the way of digital wizardry.
While it appears that the device could be beaten for performance and value by a 40basicmultimeter,the200 device is a single-purpose instrument that performs its function well.
