Cryogenic Level Measurement 2

[Ozymandias504]

Hoping Someone can point me in the right direction. I have two vessels - 70' by 16' filled with Liquid Hydrogen at -423 at 100psig using Nitrogen to offload so there is a regular hard boiling issue. I need a level measurement system to send a signal - no local indication needed.

Fully flexible regarding tank connections and etc. so I'm open to any suggestions - Mainly up against the temp and interface - has anyone dealt with this before?

Thanks.

 

[IFRs]

How accurate - gross liquid height or for custody transfer? Can you use a temperature strip on the outside of the tank shell?

 

[IFRs]

Will radar work?

 

[LCeballos]

I worked 5 five years ago, in an ASU plant (air separation unit). We had several cryogenic storage tanks (LOX, LIN and liquid argon), level were measured with a level transmitter.

You can find many fabricators (Fisher, Rosemount, etc). Level transmitter works with differential pressure, it takes gaseous phase from nitrogen and internally convert in a signal of 4-30mA, signal goes to a control room or remote panel.

Regards

 

[LCeballos]

I am sorry shall be 4-20mA