OptionalendFIT end_pressure in bar.
OptionalsensorFIT packed ANT channel identifier from tank_summary.sensor.
OptionalstartFIT start_pressure in bar.
OptionaltimestampFIT tank_summary.timestamp, when the source provides it.
OptionalvolumeFIT volume_used in litres.
Source-native FIT tank summary. Pressures are bar and volume used is litres, matching the parser's decoded FIT profile values.