Hi Folks,

Thanks in advance for your time in reading this. First time poster to this group. As a forewarning, I've spent more time on the Power T&D group, so please show mercy :)

I'm supporting a process upgrade that requires consistency measurement of hot water with some residual pulp (water side outlet of a steam scrubber). The fluid is quite hot with two options for measurement location either at 139C or 167C. The plan up to now had been to install an optical unit.

I'm finding that none of the major vendors surveyed so far offer consistency measurement for process fluid temperatures above 120C. (Valmet, BTG; awaiting responses from Voith and ABB). In general, Microwave seems to be even more limited, generally at 100C.

Has any one on this forum dealt with this limitation before, either having found a suitably rated product, or went into the engineering enough to challenge/accept the risk to the optical (or other) interface? Finally, I haven't yet looked into inferring consistency via mass-flow or other, that's the next step but any input is highly welcome!

Thanks much,
Justin