Working Principle and Routine Maintenance of Liquid Mass Flow Meter
The following is a brief introduction to the working principle and daily maintenance of liquid mass flow meters:
Working Principle
The working principle of liquid mass flow meters is mainly based on two principles: the thermal mass ratio principle and the air obstruction principle. Among them, the thermal mass ratio principle uses the differences in heat capacity and thermal conductivity of the incoming liquid to measure mass flow; the air obstruction principle measures flow based on the resistance encountered by the airflow generated behind the liquid. In practical applications, the liquid mass flow meter directly measures the dynamic flow of the incoming liquid through internal measuring elements. When the liquid flows through the sensor, the sensor detects the heat generated by the liquid on the sensor and converts this heat signal into an electrical signal. Then, based on the heat signal and the sensor's characteristic parameters, the mass flow of the liquid can be calculated.
Daily Maintenance
To ensure the long-term stable operation and accurate measurement of the liquid mass flow meter, daily maintenance is required. Specifically, regular inspections of the flow meter should be conducted, including appearance checks, connection checks, and functional tests. In addition, the flow meter should be cleaned regularly to prevent dirt, sediment, or other impurities from accumulating on the sensor and inside the pipeline, which could affect measurement accuracy. During cleaning, appropriate cleaning agents should be used, and strongly corrosive chemicals should be avoided. At the same time, the flow meter should be calibrated regularly to ensure measurement accuracy.
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