Bar Gauge
Definition
Bar Gauge is a unit of pressure relative to atmospheric pressure.
Unlike absolute pressure units (e.g., BAR), BAR_GAUGE represents the difference between the measured pressure and the local atmospheric pressure.
As this difference is not a fixed offset, no conversion multiplier or offset can be provided to convert BAR_GAUGE to absolute pressure units like BAR or PA.
Therefore, qudt:conversionMultiplier is set to 0 to indicate that no direct conversion is possible.^^http://qudt.org/schema/qudt/LatexString