@wikipedia
Synonym: Pressure (gauge) = Gauge pressure
Pressure measured by Pressure gauge.
Usually all pressure gauges are calibrated to show "0" value at 1 bar so that:
Pressure (gauge) = Pressure (absolute) - 1 bar
and
Pressure (absolute) = Pressure (gauge) - 1 bar
The differenential value of gauge pressure is the same as the absolute pressure:
In order to discriminate gauge pressure values from the absolute pressure, the gauge pressure units are usually augmented with suffix "g":
See also
Natural Science / Physics / Measurement
[ Pressure gauge ]