"RichToyBox" wrote in message
news:Haq2d.62407$D%.43296@attbi_s51...
BV,

Use number 2. An indoor outdoor digital thermometer has a long lead on
the
outdoor sensor, and it should be waterproof, so just tie it to a measuring
pole and submerge to a depth and read. I can't think of any better ideas.
snip

You disapoint me by not coming up with #3.

BV.