The world keeps running out of helium. There is now a race to prepare for the next shortage
Our lives are surprisingly dependent upon this extremely light and unreactive gas, yet supplies of it are remarkably fragile.
Weather Underground23h
What is a Personal Weather Station?
Thermistors use a thermally active resistor made of metal oxides encased in epoxy or glass. The resistance output varies based on temperature. A more accurate thermister will vary linearly ...