How much liquid nitrogen should be in a dewar?

A: If so, you&#;ll need a tank with sturdy construction and safety features. If you require a vertical tank, a CL/CLPB dewar is perfect. All models above the 15-liter size have casters for mobility. A differential pressure-type liquid level gauge, full tricock vent valve, and relief devices will safely maintain the optimal pressure within the tank.
For a horizontal tank, see the CH Series. These dewars are fitted with features that make it easy to move, like casters and welded handles. The low profile design and robust support system make these tanks safe and convenient. The CH Series is not designed for over the road transporting, inter-facility use only.

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I was discussing the price and details of supplying me with LN2 with a local supplier today. I've worked with this fellow a LOT, as he is the "old" hand there and I've dealt with him for the better part of 15 years on all of our gases and welding supplies. He's set up bulk O2, N2, argon and hydrogen at our facility, as well as worked out custom blended welding gases for some of our more proprietary welding processes. He *knows* gases.

I told him what I was after and what I knew about LN2's use for knife making (not much!) and he was surprised and even a bit "no way" when I told him how long some folks were reporting they held useable amounts for knife cryo.

So I just want to double check what I think I've understood up to this point.

Please vote and drop a comment in on your set up if you would, help me confirm what I've heard up to this point.

Thanks!

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