manometer.md

(Yellow‑zone draft)

Manometer#

Manometers measure pressure via fluid displacement. Simple in principle but sensitive to temperature and fluid purity.

Dimensional Core (SET)#

• Spin: not relevant
• Elec: optional digital readout
• Temp: affects fluid density

Why Yellow‑Zone#

Direct measurement is strong, but fluid properties and temperature introduce mixed‑regime behavior.

Regime Notes#

• pos‑regime: stable fluids, controlled temperature
• Q‑regime: mixtures, dissolved gases
• neg‑regime: vibration, rapid pressure changes

Alignment Notes#

Needs explicit fluid‑property boundaries.