U TUBE MANOMETER CALCULATOR

U-tube manometer calculator to find the gage pressure p_A relative to the atmosphere. The chamber fluid ρ₁ is separated from the atmosphere by a second fluid ρ₂.The equation of gage pressure p_A can be written as

p_A(Gage) = ρ₂gh₂ - ρ₁gh₁or (p_A(Gage) = γ₂h₂ - γ₁h₁)

p_A(Abs) = ρ₂h₂ - ρ₁h₁ +p_atm or (p_A(Abs) = γ₂h₂ - γ₁h₁ +p_atm)

The fluid in A in can be either a liquid or a gas. If A does contain a gas, the contribution of the gas column γ₁h₁, is almost always negligible so that , and in this instance equation becomes

p_A(Gage) = ρ₂h₂ or (p_A(Gage) = γ₂h₂)

p_A(Abs) = ρ₂h₂+p_atm or (p_A(Abs) = γ₂h₂+p_atm)

KNOWN PARAMETERS

INPUT PARAMETERS
Density[ρ₁]
Density[ρ₂]
Specific Weight [γ₁]
Specific Weight [γ₂]
Gravity [g]
Depth [h₁]
Depth [h₂]
Atmosphere Pressure [p_atm] (Free Surface Pressure)

Note: If fluid 2 is below point 3, then enter negative height values for h₂

Note: Use dot "." as decimal separator.

RESULTS
Pressure A Gage [pA(Gage)]		bar
Pressure A Absolute [pA(Abs)]

Supplements:

Reference:

Munson, B. R., Young, D. F., & Okiishi, T. H. (2016). Fundamentals of Fluid Mechanics, 8th Edition. Hoboken, NJ: J. Wiley & Sons.