I've been tasked with non-invasively measuring a 200 mA pulse signal through a wire. The solutions that come to mind are using a current clamp or a hall effect sensor. I don't need an accurate reading, I just need to sense when the pulse is there. Any suggestions?
Other than hall effect sensor, if you have a current probe..
set it to the best possible settings.. (just an example: 2A per 1V instead of 2 A per 100mV)..
Roll the wire 10 times around the clamp in the same direction. Now, on the oscilloscope you will measure \$10 X\$ the actual current through the wire.
For the update:.
If you are planning for multiple, hall sensor is cheaper and practical.