The liquid nitrogen in liquid nitrogen tank should be added in time
Editor:adminClick：
Time:2019-08-30 09:08
The liquid nitrogen in liquid nitrogen tank should be added in time
In general, liquid nitrogen should be supplemented when the amount of liquid nitrogen is reduced to 1/3 of the total capacity. The cryopreservation technology of livestock semen is to freeze the semen by using the freezing ability of liquid nitrogen, so that the sperm can be completely dormant and achieve the purpose of long-term preservation. Therefore, the frozen semen should be immersed below the liquid level, otherwise it will easily lose its vitality and become invalid. Therefore, liquid nitrogen in liquid nitrogen tank should be added in time, which requires accurate judgment of liquid nitrogen surplus.
There are three ways to check the amount of liquid nitrogen:
1. Weighing method: weigh the liquid nitrogen tank in time, and then make a judgment. For example, the net weight of 10L liquid nitrogen tank is about 8 kg and its capacity is 8 kg. It is stipulated that liquid nitrogen should be supplemented when the liquid nitrogen content is reduced to 1/3 of the total capacity. Therefore, liquid nitrogen should be filled in time when the liquid nitrogen tank and the liquid nitrogen weight are less than 8.5 kg. If the user does not use the lifter equipped with the liquid nitrogen tank, but hangs the frozen essence into a cloth bag and hangs it on the bottom of the panchao liquid nitrogen tank with a rope, it is possible to fill the liquid nitrogen when the weight of the liquid nitrogen and the tank is more than 7.5 kg. But if there is too much frozen semen in the container, it will bring trouble to the actual collection and release of frozen fine tubes. One is that too many ropes will be entangled in a piece, which is difficult to remove. The second freezing fine tube has a certain weight and volume, which affects the accuracy of weighing method.
2. Wood stick method: insert solid plastic rod or solid wood rod into the bottom of panchao liquid nitrogen tank, take out after 5-10 seconds, frosting length is both liquid level height. Never use hollow rods or plastic pipes to prevent liquid nitrogen from ejecting from the pipes and hurting people. The long and thick wire can also be slowly inserted into the tank, and the approximate position of the liquid level can be judged when the bubbles are muttered.
3. Observation: When sweating or frost is found around the neck of the liquid nitrogen tank, it proves that the vacuum of the liquid nitrogen tank has deteriorated and can not be used again, it should be replaced immediately.
If you are interested in the panchao liquid nitrogen tanks or need to consult, please click on our online customer service, or call us.
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