De quoi est fait manometer
An instrument that measures the pressure of a gas or liquid: a U-shaped tube of liquid or a Bourdon tube with a needle.
- Pressure — utilise. Gas or liquid pressure pushes a column of liquid in a tube or straightens a Bourdon tube that moves a needle.
- Hydraulics (Pascal’s law) — utilise. A liquid manometer is a pair of communicating vessels: the difference in levels shows the pressure.