Test - measure of low temperature

Immersing the thermometer in a bath of liquid nitrogen I obtained the following results:



The picture above was taken at the instant t=3581 s.

The data acquired every 10s are represented in the pictures below:

Channel DF0:



Channel DF1:



Channel DF2:



Channel DF3:



All channels differentials (useful to see the common evolution of the temperature between channels):



Conclusions:

• The thermometer has a temperature offset of about 10K.
  
• Fluctuations in temperature are due to background noise (For example, electronic noise, or noise due to the thermometer)