Looking for magnets for diy ato probe holder

[macawmagic]

I'm looking to buy some magents to mount to my float switch in order to mount in my ro tub instead of using the suction cups.

I'm looking at rare earth magnets online, but they say they have a Ni (nickel) and Cu (copper) coating. Will this copper harm the tank even though its incased in epoxy?

Anyone know of a place to get about 4 magents for cheap?

 

[Troylee]

Those are the magnets you want but you have to coat them with a 2 part epoxy to protect the magnent and your tank...You could prolly even use the rubber coating that comes in a can from HD. That you dip tool handles in..;)