Originally Posted by
imported_John Smith
Water level manometers certainly do exist.
NO, you are using an incorrect term.
They are NOT "water LEVEL manometers"
You DO measure pressure with them (but they are not water levels), and, in fact, you can read "inches of water column" directly off them.
For one example, go here:
Manometers
Or here:
Measurement of Pressure With The Manometer
Or here:
Gas Laws: Pressure
They *are not* "water levels" though.