17-11-2015, 12:06 PM
Hall sensors, I'd guess...
For a similar puzzle, try this: http://uk.rs-online.com/web/p/clampmeters/4955459/
We have one here. Not terribly accurate, but not bad. Sadly discontinued...
For a similar puzzle, try this: http://uk.rs-online.com/web/p/clampmeters/4955459/
We have one here. Not terribly accurate, but not bad. Sadly discontinued...







