Cloud Chamber. It replaces dry ice. As a test, I briefly connected each to a 9-volt battery. In less than a second, as the red wire went to the battery positive terminal, the radiators became almost painfully cold on one side and warm on the other. The cold side was the one that had the model number printed on it. Don't let them run for more than a second until they're secured to the fan heatsink with thermal paste or you'll ruin them. Arctic 5 thermal paste is a popular choice. They can heat up to -50Β°C, some thermal paste only down to -20Β°C. I start with 99% isopropyl alcohol at room temperature so I can approach that lower temperature. The online specification tables list Delta Tmax (how many degrees it cools from its initial temperature). Michael LoguszScience & Optics (at Blogger)
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