Vapor phase liquid nitrogen freezers are suitable for the cryopreservation of large quantities of biological samples such as stem cells, embryos, vaccines, etc. They are made of low-temperature resistant stainless steel, have large capacity and are easy to operate. They are ideal for large scientific research laboratories and international biological sample banks, providing users with fully automatic, safe and reliable deep-cryogenic liquid nitrogen storage systems.
So, do you know the specific advantages and characteristics of liquid nitrogen freezers?
1. Temperature uniformity and stability: The temperature difference of the entire storage area does not exceed 10�°C. During vapor phase storage, the low temperature at the top of the cryopreservation rack can reach -190�°C, which ensures the uniformity and stability of the temperature and is conducive to the long-term preservation of samples.
2. Compatible with vapor phase and liquid phase storage modes: Not only does it support vapor phase storage mode, it is also compatible with liquid phase storage mode. Vapor phase storage uses the low-temperature nitrogen evaporated from liquid nitrogen to store samples, avoiding direct contact between samples and liquid nitrogen, thereby avoiding the problem of bursting tubes and cross-infection of samples when the cryopreservation tubes are taken out, and ensuring the safety of sample storage. â??
3. Large storage space: The volume ranges from 350-1800 liters, which is much larger than ordinary liquid nitrogen tanks and can store more samples at one time. Its unique slanted mouth design and rotating tray partition access increase space utilization and reduce the storage cost of unit samples. â??
4. Intelligent management system: Equipped with an intelligent monitoring and management system, it can realize functions such as automatic monitoring of the temperature in the tank, abnormal reminders, remote alarms, and automatic replenishment of liquid nitrogen. â??This system not only improves the convenience of use, but also reduces the cost of manual supervision and ensures the safe storage of samples.
In short, the vapor phase liquid nitrogen tank provides an efficient and safe solution for laboratory research and sample preservation through its unique advantages.
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As we all know, liquid nitrogen tanks are used to store liquid nitrogen and preserve biological samples. They can maximize the low-temperature characteristics of liquid nitrogen. It is used in different industries such as medical research and industrial cold assembly. Small gas phase liquid nitrogen tanks, although also called liquid nitrogen tanks, are very different from traditional liquid nitrogen tanks. Then letâ??s start talking about where they differ. Small gas-liquid phase tank, it is a new type of liquid nitrogen biological container between the YDS series and YDD series. It has the same aviation aluminum material as YDS. The inner and outer tanks are made of the same material. It is relatively light but strong and has good thermal insulation effect. . It also has the same gas-liquid phase dual-mode storage and intelligent management system as YDD; and the only difference between it and traditional liquid nitrogen tanks is the storage mode! Different storage modes There is only one storage mode for traditional liquid nitrogen tanks, which is the liquid phase - the sample is completely immersed in liquid nitrogen. However, this is also its advantage. The temperature of frozen samples is relatively low, the storage time is longer and the maintenance cost is relatively low. However, there are also disadvantages. During use, you must always pay attention to the liquid level in the tank, replenish liquid nitrogen in time, and keep it covering the sample to avoid rapid evaporation of liquid nitrogen that affects sample safety. There are two storage modes for small gas phase tanks, gas phase and liquid phase. The gas phase uses low-temperature nitrogen evaporated from liquid nitrogen to preserve biological samples for a long time. This preservation method does not come into direct contact with liquid nitrogen and can avoid the risk of sample cross-contamination. In the liquid phase, the sample is completely immersed in liquid nitrogen at -196�°C and in direct contact with liquid nitrogen. Two modes can be selected according to different sample requirements. The advantage of gas phase tanks is that they are easy to use and operate, while the disadvantage is that they are more expensive to maintain. Although the storage modes of the two are different, they also have their own merits. When choosing, you can choose a liquid phase or gas phase liquid nitrogen tank based on your own needs.
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The use of liquid nitrogen has become increasingly common in scientific experiments and medical fields. As an ultra-low temperature liquid, it requires special containers, namely liquid nitrogen tanks, for storage and transportation. Liquid nitrogen tanks are a series of low-temperature containers that are made of aviation aluminum and have double-vacuum structures. They can only be used for liquid nitrogen storage or transportation. The advantage is that they are well insulated and can store liquid nitrogen for a long time, so that liquid nitrogen can be used to freeze biological samples. The disadvantage of using it is that it is difficult to move after loading liquid nitrogen and samples, and it is afraid of bumps. The connection between the neck tube and the inner tank cannot withstand shaking. However, in the storage of experimental samples, it is difficult not to involve the issue of indoor transportation. After all, it must serve the experimental subject. then what should we do? Under this demand, the liquid nitrogen tank trolley came into being! It is a tool specially designed for transporting liquid nitrogen containers. It has become an indispensable helper in the laboratory with its advantages of durability, wear resistance, collision resistance and ease of movement. The liquid nitrogen tank trolley is made of 304 stainless steel. The mechanical properties of the steel enable the trolley to maintain core stability when transporting liquid nitrogen containers and not deform due to constant pressure. For some emergencies, such as collision and friction, the wear resistance and collision resistance of stainless steel can effectively reduce the impact on the container and ensure safe transportation. In addition, the trolley is equipped with universal wheels. This user-friendly design makes movement more convenient and allows users to easily transport liquid nitrogen containers from one place to another. This is undoubtedly a great boon for laboratories and medical institutions that need to frequently move liquid nitrogen containers. The emergence of liquid nitrogen tank trolleys has effectively improved transportation efficiency and reduced labor costs. In short, liquid nitrogen tank trolleys have become an essential tool for transporting liquid nitrogen containers due to their durability, wear resistance, collision resistance, and convenience and ease of movement.
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In the laboratory, cell samples need to be placed in liquid nitrogen for cryogenic storage. However, some samples must not only be cryopreserved, but also stored in the gas phase without contact with liquid nitrogen. The former can be solved with a conventional liquid nitrogen tank, and the latter can also be solved with a gas-phase liquid nitrogen tank. However, the capacity of gas phase tanks is relatively large, above 350 liters, and the samples that laboratories need to store in gas phase are not always large. When the quantity is small, using gas phase tanks to store them is really overkill. So how to preserve these samples? There is a small gas-liquid nitrogen tank, you can also call it a small gas-liquid tank! It is also specially used for gas phase storage of stem cells, embryos, semen and other biological samples. It has moderate capacity, low liquid nitrogen loss, easy operation, and is more suitable for laboratory gas phase storage of small quantities of samples. Its gas-phase preservation principle is very simple. It is based on the characteristics of liquid nitrogen having a boiling point of -196.56�°C under normal pressure and the natural formation of nitrogen. The area of the small gas-liquid phase liquid nitrogen tank is divided into two, liquid nitrogen is placed at the bottom, and the sample is frozen. The rack is suspended above the liquid nitrogen, and with the help of the natural volatilization of the liquid nitrogen, a low-temperature environment is formed in the container. At this point, is there a familiar and unfamiliar feeling? That's right, the small gas-liquid phase tank is a smaller version of the YDD series gas-phase liquid nitrogen tank. Except for the difference in material and capacity, the rest of the characteristics are the same. For example: compatible with gas-liquid phase dual-mode storage, intelligent management system, etc.; therefore, the principles between the two are also interoperable! In short, the small gas-liquid phase tank makes up for the YDD series's demand for small-volume cell storage in terms of capacity. It is a lightweight and energy-saving gas-phase storage liquid nitrogen container specially designed for gas-phase storage of small-capacity cell samples.
Regarding long-term cryopreservation of cells, there are two optional containers, liquid nitrogen tanks and gas-phase liquid nitrogen tanks. The former is to freeze cells in liquid nitrogen; the latter is to freeze cells in a low-temperature environment generated by liquid nitrogen; Both of them also rely on liquid nitrogen for cooling, but some people say that using gas-phase liquid nitrogen tanks is safer. Why is this? In fact, no product can be guaranteed to be perfect. It cannot be said that using gas-phase liquid nitrogen tanks to freeze cells is safer. It can only be said that the safety index is higher than that of conventional liquid nitrogen tanks. Mainly manifested in three aspects: 1. Storage mode security The gas-phase storage mode is used to freeze cells, which uses low-temperature nitrogen volatilized by liquid nitrogen for cryopreservation. There is no contact between cells and liquid nitrogen, which can avoid cross-infection of cells during storage and avoid accidental entry of liquid nitrogen into the cryopreservation tube. pipe burst problem; 2. Temperature safety The temperature inside the gas-phase liquid nitrogen tank is divided into zones. The temperature difference between the upper and lower parts is about 10�°C, which can be said to be very stable. The temperature at the mouth of the tank can be maintained at -190�°C. The lower the temperature, the lower the temperature. No matter where the cells are stored, , the activity will not be "excited" due to large fluctuations in temperature, thereby losing activity. 3. â??Equipmentâ?? security The gas phase liquid nitrogen tank has a complete intelligent monitoring system. It can detect temperature, 3 temperature sensors, transmit internal temperature in real time; It can monitor the liquid level, determine the liquid level height, and can pre-set high/low liquid level alarms; In addition to these functions, there are also heat exhaust functions, lid opening and defogging functions, alarm and remote alarm functions, event recording, and communication functions. These functions all serve the safety of cells. This is why the safety index of gas-phase liquid nitrogen tanks is higher than that of conventional liquid nitrogen tanks.
