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1. MFC thermal gas mass flow meter controller gas coefficient sealing table
MFC thermal gas mass flow meter controller gas coefficient sealing table MFC thermal gas mass flow controller (MFC) is generally calibrated with nitrogen gas. When using other gases, due to the different physical properties (such as density, thermal conductivity, etc.) of different gases, the flow rate readings displayed by MFC need to be converted to obtain the actual flow rate of the measured gas under standard conditions. This conversion process depends on specific gas coefficients. The following is the gas coefficient sealing table and related instructions provided by MFC Mr Lee:
1. Gas coefficient sealing table (note: the values in the following table are examples, and actual values may vary depending on different models of MFC) (Table instructions: The table lists the conversion coefficients between different gases and nitrogen. For example, when using helium, the conversion coefficient is 1.382, which means that the nitrogen flow reading displayed by MFC needs to be multiplied by 1.382 to obtain the actual flow rate of helium. ）
2. Instructions for use: To determine the type of gas being tested before using MFC, it is necessary to first determine the type of gas being tested.
. Search for Conversion Coefficient: Based on the type of gas being tested, search for the corresponding conversion coefficient in the gas coefficient sealing table. If the measured gas is not listed in the table, you can try using the conversion coefficient of a gas with similar physical properties to the measured gas for estimation, or contact the MFC manufacturer for more accurate conversion coefficients. Perform flow conversion: Multiply
Example: Assuming we use an MFC to measure the flow rate of helium gas bending, the MFC displays a nitrogen flow rate reading of 100 sccm (standard cubic centimeters per minute).
. According to the gas coefficient sealing table, the conversion coefficient of helium is 1.382. Therefore, the actual flow rate of the measured helium gas is: 100 sccm × 1.382=138.2 sccm, which means the actual flow rate of the measured helium gas is 138.2 standard cubic centimeters per minute. In summary, the gas coefficient sealing table of the MFC thermal gas mass flowmeter controller is an important tool for converting different gas flow rates. When using, it is necessary to confirm the type of gas being tested, search for the corresponding conversion coefficient, perform flow conversion, pay attention to changes in environmental conditions, and regularly calibrate and verify.2. How much does a thermal mass flowmeter cost?
3. Working principle of thermal gas mass flowmeter
Thermal gas mass flowmeter work
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