Yea, but why have the spiral thingy? You can count just fine with a straight tube like the ADA carbcon ruby or any cylinder that goes from small to large to small filled with a liquid.

It makes little sense other than to look pretty.

The ADA beetle counters are actually much better and more able to count higher flow rates IME.

This just seems like lip service to ADA without thought.
I also do not understand the wide ugly lip on these style/brand.

Looks bad, bulky and serves little use.

Regards,
Tom Barr