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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 < 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.

DanAbdn
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2 Answers2

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I am not a brewmaster but from what I understand the temperature will change slowly. Your problem is not to contaminate the beer, you can use a stainless possibly even a plastic tube that is sealed on the immersion side and use a DS1820B sensor commonly used on Arduinos as well as other platforms. The response will be slower then if the sensor is inserted directly but since the change is slow it should work AOK. This keeps it simple and probably something you have done before.

Gil
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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

Lesto
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