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What are liquid nitrogen dewars made of?

liquid nitrogen dewars made of

Liquid nitrogen dewars are used in the laboratory for temporary storage of liquid nitrogen, dry ice and other cryogenic materials. They provide a stable, low temperature environment to protect delicate biological cells and preserve their integrity. They are also a good way to cool and transport samples.

The main components of a liquid nitrogen dewar are the inner and outer shells, which are constructed of aluminum. The inside of the dewar is filled with a vacuum layer that provides insulation between the inner and outer walls of the dewar. This helps to prevent the boiling of the contents within the dewar.

The most common dewars include the wide mouth cylindrical, hemispherical and narrow mouth spherical dewars. These are available in a variety of sizes, with the most common being 20 and 30 ml.

What are liquid nitrogen dewars made of?

Some of these models also come with a handle for ease of handling and portability. A polyethylene lid can be added to the dewars if desired, and some have protective mesh on them for better safety and convenience.

A range of hand-held dewars are available to assist with the transfer of liquid nitrogen from the large floor dewar to your own work area. These dewars can be filled from the large floor dewar by using the hose attached to the large floor dewar and a funnel.

These are the most popular and convenient dewars for transporting and filling liquid nitrogen. They have an aluminum body that extends the full length of the dewar, which increases portability and pouring efficiency. A polyethylene stopper is also provided to help minimize evaporation.

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A number of Pope dewars are rated among the most efficient glass dewars in the world, which is due to rigid quality controls and several outstanding design and manufacturing features. Most models are available in an exterior metal housing that extends the full length of the dewar, adding the safety of metal to the efficiency of glass. A small lip is extended on the dewar to allow for easy pouring and a vented polyethylene stopper is supplied to minimize evaporation.

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The LD series of cryogenic dewars are designed for storing and dispensing small quantities of liquid nitrogen in material science and biological cryo labs. They feature a beaker style with a wide mouth and pitcher style models for easy pouring. The necktube core is thermally insulated to minimize liquid nitrogen loss. The inner and outer shells are constructed of durable, lightweight aluminum and the vacuum space between the two is filled with technologically advanced insulation to ensure consistent cold temperatures.

The Liquid Withdrawal Device (LWD) (#81750-25-4) is a pressure transfer unit that clamps to the special neck flange under the plastic trim collar around the neck of these containers. The LWD can be inserted into the neck of LD25, LD35 and LD50 dewars to dispense liquid nitrogen at rates up to 8 liters per minute.

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