MiniVap ON-LINE is a process monitoring analyzer for the determination of the vapor pressure of gasoline, crude oil, LPG and NPG. Also, the vapor-liquid ratio (LVR) of gasoline can be measured.  Its core shares the same triple expansion measurement method, which is used in the MINIVAP laboratory analyzers. MiniVap On-Line is automatically calibrated with 2.2 Dimethylbutane in programmable intervals and calibration corrections are completed fully automatically for all measurements going forward.