Let me explain this in simple words, and maybe you will get it. The flowmeter isn't shown in the formal "list of equipment"....but it is referred to multiple times in different places in descriptions of the demo. Therefore, the flowmeter was there, and used, despite the fact that it isn't "listed in the report's canonical list of measuring devices". Exactly why it got left out of the list, I neither know nor care. Other evidence proves its presence and use.
One of the participants makes the statement that when they left for the night, they focussed a video camera on the flowmeter to automatically take data in their absence. I thought that was a cute "trick" to turn a totalizing flowmeter into a real-time measuring device.
It’s not a cute trick, it’s retarded and half-assed, just like everything else in the test. By the way, if there was a flowmeter used to take accurate volume measurements, the data sure wasn’t in the report I read.