Last week I broke my trusty old stream thermometer. It was a simple, small, analog (liquid in glass tube) device in a plastic protective housing. I think that I paid 99 cents for it about 10 years ago.

I went on line this morning to look for a replacement and found that we flyfishermen have been seduced by technology. Most of the thermometers for sale at fly fishing sites were digital, infrared, battery-powered, etc. They were also expensive.

I wonder if anyone knows where I could find a rapid, simple, cheap ($5-10), small (< 5 inches in length so that it will fit in my pocket), rugged thermometer that is suitable for use as a stream thermometer.

Many thanks for your help.