user7623: 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.

user14095: 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.

7623: <p><strong>Hello,</strong></p>

<p>I have an Arduino Yun and I brew beer.</p>

<p>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).</p>

<p><strong>Question: What temperature sensor would be best suited to this task?</strong></p>

<p>It must be:</p>

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

<p><strong>Thanks, Dan.</strong></p>
 14095: <p>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.</p>
