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"Evaporative Refrigeration" "Adsorption Refrigerator" "Zeolite Refrigerator" Part 2

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Harbor Freight vacuum pump: http://www.harborfreight.com/25-cfm-vacuum-pump-98076.html A little bit more about the vacuum pump in my first video (Part 1)
Homemade Pirani Gauge?: http://www.drkfs.net/pirani.htm
The solar vacuum tube that I'm using in this video as a refrigerator was purchased here: http://www.truckcitycbgps.com/ Like I said in the video, it used to be $70 at this site, but now it's $120. Still cheaper than the other sites I've found that sell the larger (125mm diameter) tubes (can't find those sites right now). If you want the smaller diameter tubes, ebay sells 500mm length x 43mm inside diameter tubes (10 tubes for $100, free shipping).
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