What type of level gauge is suitable for measuring the level in a vacuum tank?
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Is a double-flange differential pressure level gauge the better choice for measurement?
This post was last edited by zzyslhj on 2010-11-22 at 14:24. This matter cannot be considered only in this way; one also needs to take into account the physical and chemical properties of the medium. For radar, ultrasound, nuclear level measurement, and double-flange systems, different transmitters need to be chosen depending on the appropriate operating conditions
Reply to 2# zzyslhj: It’s basically correct, but ultrasound cannot be used – it isn’t feasible in a vacuum environment. :)
The medium is water; is it better to use double flanges?
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Reply to 5# jhg1991: Radar or buoy are both acceptable; try to avoid using double flanges whenever possible
Diaphragm double-flange level gauges cannot be used; in a vacuum environment (especially due to the instability of the vacuum), the measured level will be artificially high and subject to changes. I have experienced inaccurate readings with double-flange level gauges in vacuum reflux tanks. As for the radar and buoys, I haven’t used them yet! I think buoys should work!
Double flanges are not suitable, as the gas phase on the negative pressure side is under negative pressure, which will damage the flange diaphragm, causing it to bulge and get damaged. In fact, the liquid level detection height for such vacuum equipment is usually quite low, generally within 2 meters. In such cases, the most cost-effective, efficient, and simple method to use is a magnetic float level gauge