Level transmitter interface RF

Hi guys

I have a interface level transmitter old one using RF the reading is not accurate we need to move to new technologies as GWR can we have some sugestion

It will be installed in tank emulsion oil water

Regard

Check Vega interface level transmitters

Check Emerson GWR LTs

https://www.emerson.com/documents/automation/technical-note-guided-wave-radar-interface-measurement-rosemount-en-78542.pdf