Liquid Nitrogen Cryogenic Tank Level Monitoring
When using liquid nitrogen tanks, it’s crucial to constantly monitor the liquid nitrogen level inside. Replenishing the tank as needed ensures the sample remains at a constant -196°C, preserving its activity. Generally, replenishment is necessary when the level drops below one-third. Insufficient liquid nitrogen will prevent complete coverage of the sample, causing the internal temperature to rise and ultimately damage the sample. However, liquid nitrogen tanks are not transparent, making it impossible to directly observe the internal liquid level. Even with the lid open, the cryogenic l......