Clearly we have irreconcilable differences of opinion on the Optris emissivity and alumina, etc. We are at an impasse.
So let's move on to another subject for a fresh start.
Dewey once claimed that there was a little problem of a serial number on the water meter (AKA flowmeter).
Do you suppose that by serial number, he meant the actual serial number, or maybe instead the model number? (Since the reported (by Murray, Exhibit 5) model number seems so unsuitable for the required purpose).
Below are two images of the model specified by Murray, albeit the one used on the mW plant might not have used the steel cover and electric counter sending unit with convenient 100kg (~L) increments.
The flow rates on the label are as Murray described. Note there is both a model number tag and a serial number. If the model number was transcribed wrong by Murray, then perhaps a water meter that was operating within it's certified range was actually installed and used.