Flow meter selection
Thread Content
Which type and which brand of flow meter should be used to measure gas flow with large density fluctuations?
This post was last edited by leit on 2019-3-22 at 11:57. If the composition doesn’t change much, thermal mass can be used; in fact, most flowmeters can benefit from online temperature and pressure compensation, such as orifice plates, vortex flowmeters, etc.
Use a mass flow meter! The commonly used one is from Emerson
For vortex flowmeters, they are simple and practical to use. For larger diameters, insert-type mass flowmeters might be a good option; thermal mass flowmeters, on the other hand, have specific requirements regarding the type of gas used
It depends on how much you are willing to spend – imported brands like Yokogawa and E+H, for example. For domestic products, I have them available for production here. 477702226 (QQ); you can ask for quotes and make comparisons – all are calibrated with real flow rates. For the top domestic brands, there are companies like Chuanyi and Tiankang! ! It depends on your choice.
This is Jiangsu Jinling Instrument Co., Ltd. You can inquire about prices and take a look: lol
Nowadays, mass flowmeters all measure their own density – why is that not suitable? It’s just that the relative cost is higher
Mass flow meters are capable of measuring density on their own, but the problem is that this value keeps fluctuating. Even if they can be used somehow, various problems will still arise. In such conditions, vortex flow meters and turbine flow meters are the best choices.
It is recommended to use swirl vortex, turbine, and Roots flowmeters, all of which come with online compensation for temperature and pressure. Vortex flow meters are not suitable; they require a higher flow rate, and may not be able to cover your minimum flow rate. When the density is high, the flow rate is generally low, making measurements more difficult. Therefore, it is necessary to provide appropriate parameters to select a suitable flow meter and diameter that can cover your minimum and maximum flow rates.