Which thermometer for home brewing Hello,

I have an Arduino Yun and I brew beer.

I would like to log the temperature of the beer at all time during the fermentation process (final stage).  This means the thermometer would have to remain in the beer during this time (10 days).  The temperature would be &lt; 40 degrees Celsius (probably around the 20 degree mark).

Question: What temperature sensor would be best suited to this task?

It must be:


Food grade
Can be used in alcohol for extended periods
Can be hooked up to Arduino (i.e. add a library and ready to go)


Thanks, Dan.
You are looking for a thermocouple.

They need some specific chip to be read, so you'll probably want to spend a bit more and get a chip with a digital interface, there are some witch has arduino library, like MAX6675 (output at 1Hz, 0.25° precision).

As this chip read "C type" thermocouple, you just have to find the right probe for your needing, with probably can be found in many specialized store.

You may even buy a normal k probe, and then wrap it up in some protective case. Obviously that case should be designed to let the heat flow easily, but without short circuiting the probe; a food plastic bag;

or just spend a little more money and buy a stainless steel probe