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Tag Archives: Machining

Liquid Nitrogen – Part 1

June 26, 2014 12:47 pm / Ryan

LN2 withdrawal system
Liquid nitrogen (LN2) rocks. Yes, officially speaking, I need to get liquid nitrogen at PS:One so that we can do serious sciencey stuff, like, say, energy dispersive X-ray spectroscopy on the scanning electron microscope. But, unofficially? Driving nails into wood with a frozen banana, or making ice cream, is just plain awesome. And the clouds of chilled water vapor billowing out of flasks like something from a mad scientist’s lab… what can I say, I’m easily amused.

First, we need a source to buy LN2. Fortunately, a very generous individual, who happens to own a really cool company that has helped us in the past with CO2 tanks and refills, and provided free LN2 to test the EDX detector on the scanning electron microscope, offered us a great deal for purchasing it. But transporting -321F liquid to PS:One and storing it presents unique challenges.

LN2 boring the plug
So we need to start with a large storage dewar. These can be ridiculously expensive. I scoured eBay, found one, posted a crowdfunding request to the PS:One mailing list, and, thanks to the generosity of a bunch of donors, I made the purchase.

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Posted in: Projects / Tagged: liquid nitrogen, machining, PS:One

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