Jan,
I have one and it works well. The software allows you to calibrate it with
a laptop and once I set it up I have not needed to revisit it in one year of
operation. I currently have the static side of the pressure sensor
connected to the tank vent, which is not as per Tony's design. I find that
when I descend the fuel gauge reads low. I have been meaning to vent it as
per Tony's design, however I have a fuel totalizer which works well, hence
there hasn't been any pressing need.
In closing, if you want a non invasive means of measuring your fuel contents
then Tony's gauge works fine.
Paul
----- Original Message -----
From: "Jan de Jong" <jan.de.jong@xs4all.nl>
Subject: Europa-List: Hydrostatic pressure fuel level measurement?
>
> Tony Krzyzewski designed a non-invasive hydrostatic pressure fuel
> quantity measurement several years ago.
> A problem is that there is no obvious possibility for self calibration
> once it is in operation. But then, sometimes things work better than
> expected, sometimes worse.
> I'm wondering how the pressure measurement has fared in practice?
> Are people using it?
> What size errors?
> Suspected error sources - sensor and/or other variability?
> Long term stability of the sensor?
> Error modes - mostly offset or gain too?
> Has a combination with one or two digital single level sensors been tried?
> Might mechanically switching the sensor pressure input (break before
> make) for a periodic 1-point recalibration be feasible (and useful)?
>
> Grateful for any data and insights,
> Jan de Jong
> 461, the wings
>
>
>
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