I'm looking for a simple, cheap device to detect low ac current. It will be used to detect irrigation valves. These valves operate @ 24 vac (60 hz) typically 100 - 200ma. I just need a go-no go signal, I'm not interested in the actual value. The device needs to be a "clamp on" type with no physical connections. I'm open to rolling my own, this is a one-off project. Perhaps something with a hall sensor, clothes pin type of thing. Any ideas out there?
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