Advantages over constant temperature differential gas mass flowmeters

Compared with the constant temperature difference gas mass flowmeter, it has the following advantages: (1) The larger measurable flow rate of the constant power flowmeter is larger. With the increase of the medium flow rate, the heat of the heated platinum thermal resistance is quickly taken away. For the constant temperature difference flowmeter, it requires a rapid increase in the energy of the heated resistance to ensure a constant temperature difference. However, because the increase of energy is affected by the power of the circuit itself and the larger allowable current of the heated platinum resistance, its maximum value is limited. The flow measurement of the constant power type is easy to realize. Usually, the maximum measurable speed of the flow meter with the constant power principle is 488m/s to the air, while the maximum measurable speed of the flow meter with the constant temperature difference principle can only reach 38m/s. (2) The constant power flowmeter is not easily affected by dirty and wet media. In order to make the constant temperature difference flowmeter respond quickly to the temperature and maintain a constant temperature difference, the platinum resistors are generally made relatively thin, while the constant power flowmeter can be made thick (the size of each manufacturer is different). In this way, when measuring dirty and wet media, dirty and wet substances may produce short-term attachments to platinum resistors (any manufacturer uses polishing treatment for platinum resistors, and long-term attachments are not easy to produce). For thinner platinum resistors, their attachments will have a greater impact on the heat dissipation of the heated platinum resistors, and in severe cases, the measurement accuracy will be greatly reduced. Constant power is much better for measuring dirty and wet media. (3) The constant temperature difference flowmeter does not compensate for temperature changes, but the constant power flowmeter can automatically compensate for the full range of temperature changes. As we all know, the heat flow coefficient and equilibrium constant are changed by the change of temperature. Generally speaking, they are constant only in the range of 30°C. When the measured gas temperature range exceeds this value, the heat flow coefficient and equilibrium constant of the gas are both will change. Affected by circuit design, all constant temperature difference flowmeters on the market do not compensate for temperature, while FCI’s flowmeters using constant power can automatically compensate for thermal flow coefficients and equilibrium constants within the full temperature range. . It is difficult to keep constant the temperature range of the medium due to climate or other reasons. (4) Constant power and constant temperature difference have significant differences in high temperature resistance. At present, the higher temperature resistance of constant power can reach 454°C, while the flowmeter with constant temperature difference is generally within 260°C, which has a great difference in adaptability for measuring superheated steam.

Beijing Sincerity Automatic Equipment Co., Ltd is recognized as one of the leading manufacturer of in China.Trust in us and make Beijing Sincerity Automatic Equipment Co., Ltd your mass flow meter supplier. Our products will bring more economic value to you.

Compare the various types of that are available. At Sincerity Mass Flow Meter Manufacturers, the range is constantly being updated with new models, technical details and competitive prices.

While manufacturing mass flow meter, we always pay attention to the technology and quality of the product.

In various different types of coriolis mass flow meter emerson, rosemount coriolis mass flow meter mass flow meter is one of the most commonly used.