Heat meter flowmeter is an instrument based on the principle of heat conduction to measure fluid flow. It uses the flow time of the fluid through the heat meter, the fluid takes away a certain amount of heat, and calculates the flow of the fluid by measuring the heat taken away by the fluid. The heat meter is mainly composed of two parts: the sensor and the calculator. The sensor usually consists of two parallel thermistors, called "heating resistance" and "temperature resistance" respectively. A heating resistor is heated by an electric current, while a temperature resistor measures the temperature change after a fluid passes through it. When the fluid passes through the sensor, the fluid takes away a certain amount of heat, resulting in a change in the temperature of the temperature measuring resistance. By measuring this temperature change, we can calculate the flow rate of the fluid.
The working principle of the heat meter flowmeter is based on heat conduction. When the fluid flows through the sensor, the fluid takes away the heat generated by the heating resistance, causing the temperature of the temperature measuring resistance to change. According to the law of heat conduction, the heat carried away by a fluid is proportional to the flow rate of the fluid. Therefore, we can determine the flow rate of the fluid by measuring the temperature change of the temperature resistance. The specific measurement principle is as follows: First, the heating resistance is heated by the current, so that the temperature of the sensor is maintained at a constant level. When the fluid flows through the sensor, the fluid takes away a certain amount of heat, resulting in a change in the temperature of the temperature measuring resistance. The temperature change of the temperature resistance is transmitted to the calculator for processing. The calculator calculates the flow rate of the fluid based on the temperature change of the temperature resistance. The specific calculation method varies according to different heat meter flowmeter models.
The advantage of the working principle of the heat meter flowmeter is that the measurement accuracy is higher and the reliability is better. Because the heat meter flow meter is calculated by measuring the heat taken away by the fluid, there is no special requirement for the physical properties of the fluid, and it is suitable for a variety of different fluids. At the same time, the heat meter flowmeter does not require fluid flow parts, so it is not susceptible to impurities in the fluid, and the maintenance cost is low. However, heat meter flowmeters also have some limitations. First of all, the heat meter flowmeter has certain limits on the temperature and pressure of the fluid, and it cannot work properly beyond these ranges. Secondly, because the heat meter flow meter calculates the flow rate by measuring the temperature change, it has higher requirements for the conductivity of the fluid and is not suitable for some fluids with poor conductivity. In addition, the heat meter flowmeter is also more sensitive to changes in ambient temperature, and corresponding temperature compensation is required. A heat meter is an instrument that calculates flow by measuring the heat carried away by a fluid.
It uses the principle of heat conduction to measure the flow rate, and has the characteristics of high measurement accuracy and good reliability. However, it also has some limitations, with certain requirements on the temperature, pressure and conductivity of the fluid. In practical applications, it is necessary to select the appropriate heat meter flowmeter according to the specific situation, and carry out the corresponding calibration and maintenance work to ensure the accuracy and reliability of the measurement results.
