How is the liquid level calculated, everyone?
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Does a different density of the measuring medium have an impact on the liquid level?
You need to see what type of level gauge it is – something like a magnetic flip type – and you need to consider the density as well as whether the float can float
Any measurement method related to density will have an impact
It has some impact; it depends on how high your requirements for measurement accuracy are. The density change is minimal; a low measurement accuracy is sufficient for use
For a single-flange level gauge, the actual liquid level = displayed level * design density / actual density. For example, if the designed density of the material is 0.9 while the actual density is 0.8, and the DCS shows 60%, then the true liquid level = 60% * 0.9 / 0.8
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It’s extremely relevant. The liquid level is the differential pressure value calculated based on density.
Calculations are done using the formula P=ρgh; hence, h=P/ρg, where g is a constant, typically taken as 9.807. P represents the value measured at the surface, and the height measured is directly related to density, so it is important to ensure that the density values measured are accurate.