type:dew point of moisture meter
display:digital
chemical analysis:karl fischer method
起订:1件
供应:1000件
发货:30天内
A cryogenic storage dewar (named after James Dewar) is a specialised type of vacuum flask used for storing cryogens (such as liquid nitrogen or liquid helium), whose boiling points are much lower than room temperature.
Precautions are taken in the design of dewars to safely manage the gas which is released as the liquid slowly boils. The simplest dewars allow the gas to escape either through an open top or past a loose-fitting stopper to prevent the risk of explosion. More sophisticated dewars trap the gas above the liquid, and hold it at high pressure. This increases the boiling point of the liquid, allowing it to be stored for extended periods. Self-pressurising designs use the gas pressure in the top of the dewar to force the liquid upward through a pipe leading to the neck.
| size | *单规格最小起订量 | 商品编码 | *库存(库存数量请如实填写，无库存可忽略) | *单价(US$) |
|---|---|---|---|---|
| 批量设置 | 批量设置 | 批量设置 | 批量设置 |
24*13cm | 1 | 1000 | 5000 | |
28*18cm | 1 | 1000 | 5000 | |
39*28cm | 1 | 1000 | 5000 | |
39*33cm | 1 | 1000 | 5000 | |
58*38cm | 1 | 1000 | 5000 |
