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How to measure the liquid level of cryogenic storage tanks
Date: Aug 27, 2020
In the process of using cryogenic storage tanks, we sometimes measure the liquid level in the storage tank. Measuring the liquid level of cryogenic storage tanks has many advantages and can ensure the effectiveness of the equipment. However, everyone should pay attention to the liquid level measurement. Pay attention to the selection of measurement tools. The following is a specific explanation for you.
Generally speaking, its measurement methods are various, such as steel belt level gauge, flange level gauge and radar level gauge. In the use of these liquid level timers, the general requirement is not only to measure accurately, but also not to be prone to failure, which is determined by the nature of the cryogenic storage tank.
If it is a liquid nitrogen storage tank, when the level of it is measured, if the oxygen content in the system exceeds the specified value, it is prone to explosion or equipment leakage, and peroxides may also be formed. The flange level gauge was used at the beginning, but because of its large density changes, it is easy to make the indicator appear inaccurate. So later, a steel belt level gauge was used. Because it uses mechanical transmission, jamming is inevitable and metal is prone to collision. In addition, it is not easy to perform thorough removal during cleaning, so that maintenance personnel may perform repeated inspections and mechanical parts will be damaged. 
In order to avoid the occurrence of the above-mentioned problems, the radar level gauge is chosen to measure the liquid level in the cryogenic storage tank, which is a non-contact measuring instrument. The operator does not need to enter the tank to perform installation and maintenance work. The liquid level measurement uses microwave technology, so it has the characteristics of high reliability, easy installation, and does not require maintenance.
In addition to these features, this liquid level measurement method of cryogenic storage tanks is not directly in contact with the measured medium, so the influence of these parameters such as temperature and pressure is very small; it also has a fault alarm function and a self-diagnosis function. Parameters can be monitored and modified remotely, allowing maintenance personnel to work safely.
Generally speaking, its measurement methods are various, such as steel belt level gauge, flange level gauge and radar level gauge. In the use of these liquid level timers, the general requirement is not only to measure accurately, but also not to be prone to failure, which is determined by the nature of the cryogenic storage tank.
If it is a liquid nitrogen storage tank, when the level of it is measured, if the oxygen content in the system exceeds the specified value, it is prone to explosion or equipment leakage, and peroxides may also be formed. The flange level gauge was used at the beginning, but because of its large density changes, it is easy to make the indicator appear inaccurate. So later, a steel belt level gauge was used. Because it uses mechanical transmission, jamming is inevitable and metal is prone to collision. In addition, it is not easy to perform thorough removal during cleaning, so that maintenance personnel may perform repeated inspections and mechanical parts will be damaged.
In addition to these features, this liquid level measurement method of cryogenic storage tanks is not directly in contact with the measured medium, so the influence of these parameters such as temperature and pressure is very small; it also has a fault alarm function and a self-diagnosis function. Parameters can be monitored and modified remotely, allowing maintenance personnel to work safely.
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