Water temperature sensor

[billg]

What is a good, reasonable, water temperature sensor that can be attached to the cannon ball on a downrigger?

[Nailer]

William, I moved the post to a better spot. Are you looking for one that runs all the time, or just one you can lower down and get the temp?

Fish Hawk TD is good for the latter.

[hear fishie fishie]

I've been using cheap pool thermometers for many years. seal them up

with rtv . drill a hole near top for quick draining.

to use attach to cannon ball or end or rigger cable swivel.

Lower down. wait about 10-15 minutes and bring up quickly[manual rigger works best]

read temp. If temp too warm dump water out and try deeper.

Also can used to check temp at depth fish marks are appearing to help determine type of fish being marked. My son has a clip on fish hawk that I like too but they cost upward of $100.