Quote Originally Posted by Neale View Post
Not absolutely sure. These specifically say "iron sensing" or somesuch. Because I don't have the original listing for mine, I can't say what they are. Proximity switches are sometimes iron only, sometimes anything metallic (although with reduced sensitivity, as I understand it). Mine certainly trigger on aluminium. Of course, if your trigger component is iron or steel, then that's not important.
Ive ordered 3 of them to test and see. They should be fine.

Thanks