Tony,

On Thu, 13 Apr 2006 18:49:06 +1000 (EST), Tony Smith wrote:

>...
> I was originally going to put a small magnet on a float inside the tube,
> and have a few reed switches outside.  That would work for a pond level
> indicator (reed switches are easier to deal with than hall effects), but
> you need to figure out how to stop the magnet spinning.

Mount it vertically, then it won't matter if it spins...

Cheers,


Howard Winter
St.Albans, England


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