Different classifications of Dewar

Dewars are available in a variety of shapes: cylindrical Dewars, dish-shaped Dewars, Dewars with screw holes, Dewars with flange connection, etc. From the material point of view, there are glass Dewars, Stainless steel dewar. The advantages are described below.

1. Cylindrical Dewar:
    Various shapes and design, aluminum shell, to meet the different needs of the laboratory.
    It is suitable for storing low temperature products such as liquid nitrogen and dry ice. It can also be used to freeze and store a small amount of samples in the laboratory. There is a matching cover to prevent evaporation.
 
2. Flat bottom Different dewars:
    The bottom is completely flat, especially suitable for the use of electromagnetic stirrer. Suitable for storing liquid nitrogen, dry ice and other low-temperature products, and can also store a small amount of samples frozen in the laboratory, with a matching lid to prevent evaporation
     Available in models with viewing windows on the side
 
3. Shallow bottom dish-shaped Dewar flask:
    Large opening, suitable for use with electromagnetic stirrer, can be used as a bath, suitable for controlling the temperature of the reaction bottle, especially suitable for use with JULABOFT-402, FT-902 digital input refrigerator, for low-temperature or ultra-low temperature biochemical reactions, suitable for storage Use -200~+200℃ medium
   Among them, glass dewars have unique advantages over metal dewars due to their simple structure, good thermal insulation, transparency, and good sealing. 4. Glass Dewar
    Overcoming the shortcomings of traditional products that are fragile and easily damaged during use, the highest grade of raw materials is used, and the external fixed metal protective sleeve is used to protect the finished product, which greatly extends the service life of this product and greatly enhances its resistance. The ability of external forces to destroy. Compared with similar products, it has the advantages of safety and durability. Special sizes can be customized according to user requirements, but glass is a brittle material with poor strength and fragility, so it is not suitable for manufacturing dewars larger than 250mm in diameter and 700mm in length. The volume of the spherical dewar should not exceed 10000ml.
 
5. Stainless steel dewar
    Suitable for storage and transportation of liquid nitrogen, dry ice and other low-temperature products, with a matching cover to prevent evaporation, patented structural design, good thermal insulation performance, strong and not fragile. All products need to consider their internal volume, internal diameter (internal height), liquid nitrogen storage period and evaporation rate.
    Selection: with operating handle; DSS series without operating handle, anti-evaporation and heat insulation cover is optional