We demonstrate why TECs or Peltier devices have a lower temperature limit. We also describe how low temperature liquid baths are set up in a lab, why they can be dangerous and even though we drop the "hot" side of a TEC to "only" -43C with a small amount of dry ice, we are approaching the practical limits of what TECs can do.
Previous related videos:
https://youtu.be/RkSR4rTl2GY
https://youtu.be/aSGwaQWA05U
https://youtu.be/cw8ipUYodkE
https://youtu.be/YWUhwmmZa7A
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