The minivap on-line is a process monitoring analyzer for determining vapor pressure of gasoline, crude oil, LPG, NPG and vapor-liquid ratio. The measuring principle works with Minivap VPS and LPG laboratory instrumentation and therefore produces equivalent results. This process vapor pressure tester fully complies to the industry relevant ASTM standards for gasoline (ASTM D6378), crude oil (D6377) and LPG (D6897). Up to three different sample streams can be connected to one single analyzer.