06 Comparison
Table: Comparative Analysis of Barometer, Manometer, and Hydraulic Press
1Torricellian Barometer
Primary Measurement / Function
- Absolute atmospheric air pressure
Operating Physical Principle
- Hydrostatic balancing of liquid column against air weight
Standard Mathematical Equation
- Patm = ρHg × g × hHg
2Open U-Tube Manometer
Primary Measurement / Function
- Gas pressure relative to atmospheric
Operating Physical Principle
- Pressure equality at common horizontal level in continuous fluid
Standard Mathematical Equation
- Pgas = Patm ± ρ g h
3Hydraulic Press
Primary Measurement / Function
- Force magnification for heavy lifting
Operating Physical Principle
- Pascal's principle of undiminished pressure transmission
Standard Mathematical Equation
- F / A = f / a / η = A / a
4Hydraulic Brakes
Primary Measurement / Function
- Simultaneous vehicular wheel deceleration
Operating Physical Principle
- Uniform fluid pressure distribution across four slave cylinders
Standard Mathematical Equation
- Pmaster = Pslave1 = Pslave2...