The difference between gas vortex flowmeter and gas turbine flowmeter

Gas vortex flowmeter and gas turbine flowmeter are two relatively similar products among flowmeters. You must distinguish them during use and master their respective characteristics and applications. In order to enable you to quickly master the differences between the two flow meters, the experts from China Sensor Trading Network will summarize them for you. Let’s take a look.

Vortex flowmeter is mainly used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. Its characteristics are small pressure loss, large measuring range, high accuracy, and it is almost unaffected by fluid density, pressure, temperature, viscosity and other parameters when measuring working volume flow.

There are no moving mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time.

The vortex flowmeter uses a piezoelectric stress sensor with high reliability and can operate within the operating temperature range of -20℃ to +250℃.

It has both analog standard signal and digital pulse signal output, and is easy to use with digital systems such as computers. It is a relatively advanced and ideal measuring instrument. 

The working principles of the two are different, the detection methods of the two are different, and the structures are also different. Simply put, the turbine flowmeter is a volume flowmeter that generates pulse current by the change of magnetic flux, and the vortex flowmeter measures the flow by detecting the frequency; therefore, we usually see more liquid turbine flowmeters, etc.

Vortex flowmeters can be used in almost all situations where vortex columns can be formed. They can be used not only in closed pipes but also in open grooves. Compared with turbine flowmeters, vortex flowmeters have no moving mechanical parts, require less maintenance, and have stable instrument constants.

1. Good repeatability, short-term repeatability can reach 0.05%-0.2%. It is precisely because of its good repeatability that high accuracy can be obtained through frequent calibration or online calibration. It is the preferred flow meter in trade settlement. 

2. High precision, for liquids, it is generally ±0.25%-±0.5%, and the high-precision type can reach ±0.15%; for gases, it is generally ±1%-±1.5%, and the special type is ±0.5%-±1%. Among all flow meters, it is the most accurate. 

3. Output pulse frequency signal, suitable for total quantity measurement and connection with computer, no zero drift, strong anti-interference ability.

4. Turbine flowmeter is not suitable for media with higher viscosity. As the viscosity increases, the flowmeter measurement lower limit increases, the range decreases, and the linearity deteriorates. 

5. Fluid properties (density, viscosity) have a great influence on instrument characteristics. Gas flow meters are easily affected by density, while liquid flow meters are sensitive to changes in viscosity.

Since density and viscosity are closely related to temperature and pressure, temperature and pressure fluctuations are inevitable on site. Compensatory measures should be taken according to the degree of influence on accuracy based on the physical properties of various fluids. Liquids should use liquid turbine flowmeters specifically, and gases should use corresponding gas turbine flowmeters. Only in this way can high metering accuracy be maintained. 

The differences between gas vortex flowmeter and gas turbine flowmeter are mainly reflected in these aspects, and you can continue to summarize them during the operation process.