Which liquid level transmitter is best to use under vacuum?
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Which type of transmitter is best for measuring liquid level under vacuum?
Rosemount 3051 is fine, the data sheet should indicate vacuum
EJA’s dual diaphragm level transmitter is also available
I agree with the opinions of the two people above. However, under high vacuum conditions, it is difficult for these two instruments to guarantee long-term operation. I personally favor the use of capacitive level transmitters. Because this level transmitter has nothing to do with pressure, it can also be installed in a double flange.
High vacuum EJA does not work……
~~~~~~~~~~~~~~~~~~~~~~~ There is a phenomenon of running-in of the outer drum when measuring vacuum with double flanges. Try to use a single flange~~~~~~~~~~~~~~~~~~~~~~
Guided wave radar can be used instead.
It cannot be based on imagination, but should be selected according to the instrument's instruction manual. For example, the working pressure of EJA's double-flange transmitter can reach 2.7kPa (A). When making specific selection, it is necessary to check the relevant parameters of the specific instrument according to the specific parameters of the process (pressure, temperature).
Single or double flange level gauges are not suitable for use under vacuum conditions. The diaphragm bulges out, especially in negative pressure chambers. Imported instruments may last longer. It is strongly recommended to choose radar, guided wave radar and other level gauges. :handshake
The table must indicate that it is a vacuum, and any manufacturer can do so.