What type of flow meter is suitable for thick liquids?
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This post was last edited by *aojiaoya0546 on 2016-8-4 22:09. What type of flow meter is suitable for thick liquids?
The measurement of the three types of flowmeters—electromagnetic flowmeters, ultrasonic flowmeters, and vortex flowmeters—is not affected by viscosity or is only minimally affected by it.
Electromagnetic flowmeters cannot be used in water-free media.
Flow measurement in media with high viscosity can be achieved using a target flow meter
If the precision requirement is not particularly high, an ultrasonic flow meter can be used
What specific medium is it? This makes it easier to choose, right?
Wedge flow meters and target flow meters can be used, but their accuracy is low. Ultrasonic waves are used in the settlement of crude oil trades.
You can try an elliptical gear flow meter, and its accuracy is also very high
If the viscosity is high, it is necessary to calculate the Reynolds number; vortex flow meters are definitely not suitable, while electromagnetic methods need to be considered. If precision is not required, wedge flow meters are available at a lower price. There are requirements regarding precision for elliptical gear flow meters, but their price is relatively high. Target flowmeters are not recommended, as the medium’s high viscosity can cause the target to deviate from its position.
Just one property related to viscosity, with no other information about the medium at all; can a flow meter be selected based on that alone? Are you kidding me???
For particularly viscous media, scraper, twin-rotor, or gear flow meters should be used; gear pumps are not suitable as they get stuck very easily. Target types are prone to problems, and the pressure cannot be high. Generally, viscous media have high temperatures, making ultrasound less suitable; in highly viscous media, bubbles tend to dissipate easily, and ultrasound has a significant impact on them. Positive displacement flow meters cannot be used with media that have too low viscosity either, as the low viscosity results in a lack of self-lubrication, which may lead to dry friction and affect the device’s lifespan. Liquefied gas, for example, is not very suitable for positive-displacement types.