What are the reasons for affecting accuracy when using thermal gas mass flow meters

Abstract: What are the reasons that affect the accuracy when using thermal gas mass flow meters are provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Thermal gas mass flow meters are instruments that measure gas flow using the principle of thermal diffusion. The sensor consists of two reference-grade resistance thermal resistors (RTDs). One is a speed sensor RH, and the other is a temperature sensor RMG that measures the change in gas temperature. when both RTDs are placed. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the articles that affect the accuracy when using thermal gas mass flowmeters. Thermal gas mass flow meters are instruments that measure gas flow using the principle of thermal diffusion. The sensor consists of two reference-grade resistance thermal resistors (RTDs). One is a speed sensor RH, and the other is a temperature sensor RMG that measures the change in gas temperature. When these two RTDs are placed in the measured gas, the sensor RH is heated, and the other sensor RMG is used to sense the measured gas temperature. As the gas flow rate increases, more heat is removed by the gas flow and the temperature of the sensor RH decreases. 1. The concept of accuracy: Under normal conditions of use, the accuracy of the measurement results of the instrument is called the accuracy of the instrument. It is customarily called the accuracy. The accuracy of the thermal gas mass flowmeter is:±1% reading +±0.5% of full scale 2. Influence of straight pipe section: When the straight pipe section is insufficient, it will affect the measurement accuracy. The influence of different flow resistance is different. Provide the flow resistance information and the length of the straight pipe section, and the deviation can be calculated. 3. Water and water vapor The measured medium contains water or water vapor. If there are water droplets on the probe, the measured value will be too large. The magnitude of the deviation is not computable. 4. Influence of insertion depth During calibration, the probe of the sensor is on the center line of the pipe. If the actual installation deviates from the center line, the measured value will be deviated. The magnitude of the deviation is not computable. 5. Changes in composition When the composition of the measured medium changes, the measured value will be deviated. Given the changed composition, the magnitude of the deviation can be calculated. 6. Solution For the measurement of water or water vapor in the medium, it is recommended to use the installation method of opening a hole at an angle of 45 degrees in the lower semicircle of the horizontal pipe. Haines Automation Instrumentation is a professional manufacturer of electromagnetic flowmeters, turbine flowmeters, vortex flowmeters, magnetic flap level gauges, thermocouples, thermal resistances, bimetal thermometers and pressure gauges of various specifications, etc., as well as the production of various As a manufacturer of non-standard flowmeters, the company has advanced management level, modern professional production equipment, and accurate calibration devices. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'What are the reasons for affecting the accuracy when using thermal gas mass flow meters'

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