AVR-Chat

> Detection range is only 1.5m. OP asks for 15m.

I was considering one of these:

http://www.sparkfun.com/commerce/product_info.php?products_id=9009

For my water tanks but they are completely buried so could get flooded in a
storm so I might try the:

	measuring the upwards force exerted by a float at the bottom of a
long pole held vertical idea.

Regards

Alex Shepherd