Accuracy and stability analysis of cryogenic gas mass flow meters

Project Overview

Cryogenic gas mass flow meter is an instrument for measuring the mass flow rate of cryogenic gas. It is widely used in many industrial fields, such as petrochemical, chemical, food, medicine and so on. Due to the physical characteristics of cryogenic gas, the accuracy and stability of cryogenic gas mass flow meter is an important index to measure its advantages and disadvantages.

I. Working principle of cryogenic gas mass flow meter

Cryogenic gas mass flow meter adopts the principle of thermal mass flow meter. It calculates the mass flow rate of gas by measuring the heat flow rate of gas flowing through the sensor. Specifically, the sensor usually consists of two thermistors and a heater. As the gas flows through the sensor, the heater heats the gas to a temperature such that the temperature difference between it and the sensor surface produces a constant heat flow. The thermistor measures the temperature of the sensor surface, and the gas flow rate can be calculated according to the principle of heat conduction.

Second, the accuracy of cryogenic gas mass flow meter

The accuracy of cryogenic gas mass flow meter refers to the deviation between its measured value and the real value. Accuracy is affected by many factors, such as the physical properties of the gas, sensor design and manufacturing process. In practical application, in order to ensure accuracy, the sensor needs to be calibrated and debugged according to the actual situation.

Third, the stability of cryogenic gas mass flow meter

The stability of cryogenic gas mass flow meter refers to the fluctuation of its measurement value in a certain period of time. Stability is affected by a variety of factors, such as the physical properties of the gas, sensor design and manufacturing process. In practical applications, the sensor needs to be long-term stability test to determine its reliability and stability.

Application of low-temperature gas mass flow meter

Cryogenic gas mass flow meter is widely used in various industrial fields, such as petrochemical, chemical, food, medicine and so on. In petrochemical and chemical fields, it is usually used for gas flow measurement and process control. In the field of food and medicine, it is usually used for gas sterilization and gas quality control, etc.

V. Conclusion

Cryogenic gas mass flow meter is an important instrument for measuring the mass flow of cryogenic gases, and its accuracy and stability are the key indexes for evaluating its performance. Accuracy is affected by the physical properties of the gas, sensor design and manufacturing process and other factors, and needs to be calibrated and debugged in the actual application to ensure that the measured value and the real value of the smallest deviation. Stability is affected by a variety of factors such as the physical properties of the gas, sensor design and manufacturing process, and requires long-term stability testing to determine its reliability and stability.