Eli5: why does an IV drop into that capsule that’s half full of iv and half air?

Question

Eli5: why does an IV drop into that capsule that’s half full of iv and half air?

In: 1726

Answer 1

The purpose of that chamber used to be to determine flow rates. We used pumps now but the units were in drops per minute.

https://www.mometrix.com/academy/calculations-of-drip-rates/