I want to buy this current sensor from eBay. I couldn't find how it works, but I presume it works like the other ones through induction. On many sites it says it has a maximum current of 5 amps, but I'm wondering what would happen if a higher current would be used? Specifically I'd like to sense something up top 15 amps.
The core will tend to saturate so you'll lose accuracy. How much is anyone's guess, but if it really works down to 20Hz/5A it might not be too bad at 60Hz/15A. I have doubts- would not be gobsmacked if it reads 30 or 40% low at 15A. Otherwise they put 2x ~ 3x as much core in there as they needed.