FS10 SeriesFluid Components International LLC 5Flow Direction ArrowSensors perpendicular“A” (Active) markUpstreamFlow DirectionSensors parallelLeft to Right Flow Example in 1/4 and 3/8 inch tube teesFor optimum sensitivity in low flow applications, probes shouldbe installed with the “A” (Active) sensor positioned upstream.Horizontal lines: gas or liquid.Vertical lines: gas - flow must be downliquid - flow must be upRight to Left Flow Example in 1/2 inch or greater tube orpipe teeProbes mounted into 1/2 inch or greater tees are installed withthe sensors positioned perpendicular to the flow path in thetee. “A” (Active) should be facing up in side mount horizontalconfigurations. These sensors may also be marked with a flowdirection arrow.Mounting OrientationDiagram 1