The Arnia hive monitor? No, it can’t really do that. 
I guesstimated it with my low-tech brain instead. 
I based my wild guess on the following thoughts:
- I always lost a fair amount of honey with the cappings. Even if you leave them in a sieve, you still don’t get it all. With the Flow hive, you don’t need to uncap. Either you drain the honey, or the bees get to to reuse it efficiently.
- It was impossible for me to get every last drop of honey out of the extractor. There were always a few reluctant tablespoons worth of honey left in the bottom
- My traditionally extracted honey always needed straining. So 2 sieves and one pair of tights trap quite a bit of honey. Even if I left it dripping for a couple of days, some was always lost. My Flow honey doesn’t need straining.
- The strainer needed to sit over a honey tank. Like the extractor, I always lost a bit of honey in the tank, either in the bottom of the tank or in the honey gate (tap at the bottom of the tank).
It is probably a huge overestimate, but I feel happy that I am wasting far less honey with the Flow frames than I would have by extracting the old way. I am probably just not very efficient in the traditional methods! 