This was my absolute favorite unit I ever used, Baxter makes superb equipment, but for $10K it better be! That Baktec is even more, but it’s the most accurate one I know of.
$3000 for the replacement sensor alone:
A couple more actually reasonable suggestions:
This one will actually regulate flow and stop it for you once the reservoir is full:
And this is a nicer manual meter compatible with remote monitoring upgrades