In-Line Pitot Tube – Overview The In-Line Pitot Tube “Flo-bar” is a Stainless Steel pipe section with welded-in pitot probes. It is available for ½” to 2″ pipes. They are supplied fitted with ¼” ball valves to provide process isolation. Suitable for liquids and gases. In-Line Pitot Tube – Features Flow sensors for liquids or gases ±1% of the actual flow rate Flow averaging Internal isolation ball valve No power supply required Full electron beam welded construction