Liquid Nitrogen Dewar
Liquid nitrogen is the liquefied gas that is used to make instant ice-cream at top restaurants, or to create an impressive cloud of vapour when exposed to air. It is also a popular ingredient in medicines to remove skin and warts, as well as in cryogenics, where scientists study the effects of very cold temperatures on materials.
It is a very dangerous substance to drink or swallow, however, as it is colourless, odorless and tasteless, and will not give warning when it has reached its boiling point. That is why liquid nitrogen dewar are used to safely store this liquefied gas in a controlled environment.
The most important thing to remember when using a liquid nitrogen dewar is that it must be kept in a sealed, insulated container. This prevents any risk of leakage, which can be a hazard in confined spaces.
What Is a Liquid Nitrogen Dewar?
There are several types of liquid nitrogen dewars, each with a different purpose. Some are used for short-term sample storage in a benchtop or shipping vessel, while others are free-standing systems designed for long-term sample storage within a laboratory’s cryogenic environment.
Simple dewars allow the liquid to escape through an open top, while more sophisticated designs trap the gas above the liquid and hold it at high pressure to increase its boiling point. This prevents any risk of explosion and allows the liquid to be stored at higher temperature for longer periods of time.
A foam dewar is an ideal alternative to glass vessels or styrofoam shipping containers, as it is chemically inert and can withstand direct exposure to liquid nitrogen without leaking or degrading. The patented design also minimizes thermal mass, which means less liquid nitrogen is needed to boil the dewar when it is filled.
A wide mouth cylinder dewar is a vacuum lab-grade standard flask that is designed for efficient use with liquid nitrogen and other liquid gases. These vacuum flasks are made of double-walled borosilicate glass that is fully silvered, evacuated to 10-5 and covered with a protective mesh. These flasks feature a polyethylene stopper specially vented to minimize evaporation.
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Available in both beaker and pitcher-style designs, these dewars are designed for safe storage and easy pouring of LN2. All models are compatible with American BioTech Supply’s specially designed pouring spouts. Cryogenic vial canes are ideal for storing cryogenic vials in a cryogenic dewar or liquid nitrogen tank, and they are light-weight and durable. A clear plastic sleeve keeps the vial in place while stored on the cane.
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These canes are also suitable for storing other items in a liquid nitrogen tank or dewar, such as tools and equipment. They can be purchased with or without a carrying handle. LD dewars are designed for storing and dispensing small amounts of liquid nitrogen in laboratories or medical facilities. They are available in beaker and pitcher-style designs, with a range of capacities to accommodate different applications.