| 摘要 |
The present invention relates to a method of determining a level (4) of liquid cryogen (3) in a cryogenic vessel (2). In order to provide a simple and reliable technique for determining a level (4) of liquid cryogen (3) in a cryogenic vessel (2) it is suggested to operate a heater (8) for a defined period of time to evaporate a certain amount of liquid cryogen (3), to determine the change (10) in pressure inside the cryogenic vessel (2), and to determine the level (4) of liquid cryogen (3) in the cryogenic vessel (2) based on a known correlation between the pressure change (10) and the cryogen level (4). |
