Application of Temperature and Pressure Compensation Vortex Flowmeter

The temperature and pressure compensation vortex flowmeter is mainly used to measure the flow of media fluids in industrial pipelines, such as gases, liquids, and vapors. It is characterized by low pressure loss, large range, high accuracy, and almost no influence of parameters such as fluid density, pressure, temperature, and viscosity when measuring the volumetric flow rate. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable over a long period of time. The instrument uses a piezoelectric stress sensor, high reliability, can work in the operating temperature range of -10 °C ~ +300 °C. There are analog standard signal and digital pulse signal output. It is easy to use with digital systems such as computers. It is a relatively advanced and ideal flow.

The greatest advantage of vortex flowmeters is that meter coefficients are not affected by the physical properties of the measured medium and can be extended from a typical medium to other media. However, due to the wide range of fluid and gas flow rates, the frequency range also varies greatly. In an amplifier circuit that processes vortex signals, the passbands of the filters are different and the circuit parameters are also different. Therefore, the same circuit parameters cannot be used to measure different media.
The vortex flowmeter is a new type of flowmeter for measuring the fluid flow of a closed pipe according to the Karmen vortex principle. Because of its good media adaptability, it can directly measure the volumetric flow rate of steam, air, gas, water and liquid without temperature and pressure compensation. With temperature and pressure sensors, it can measure the standard volume flow and mass flow, which is throttling. Ideal alternative to flowmeters.
In addition, the density of gas and liquid is very different, and the intensity of the signal generated when the vortex is separated is proportional to the density, so the difference in signal intensity is also great. The gains and triggering sensitivities of the liquid and gas amplifier circuits are all different. Piezoelectric charge has a large difference, and the parameters of the charge amplifiers are also different. Even if the same gas (or liquid, vapor), with the different pressure, temperature, density, different flow rates used, the signal strength is also different, the circuit parameters also change. Therefore, it is not feasible to change the medium or change the gauge diameter of a vortex flowmeter without hardware or software modification.

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