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Direction of Flow Indicator


Direction of Flow IndicatorThis extremely sensitive flow measurement tool provides flow direction information by responding to slight differences in pressure at two points on a cable system. The maximum deflection range of the gauge pointer is 0-2 inches water (0.0 to .072 psi). Because it can detect such small pressure differences, it is ideal for chasing flow in interlaced cables. It can also be used to check for leaks in pneumatic plugs.

System Studies' Direction of Flow Indicator is a replacemnet for the manufacturer-discontinued clear plastic block version that used a Styrofoam float to indicate flow direction (Part No. 9800-3200).

This new product offers excellent directional sensitivity and reading recognition when tracking the movement of air between cables. Its gauge face has a prominent black vertical line that is used to center the tool's reference needle. On opposite sides of this reference point are distinctly colored bands—one blue and one yellow). Two generous lengths of plastic tubing, each with a tank valve connector on the end, are threaded onto tank valves on the cables being tested. One of the air connectors has an identifying blue plastic collar; the other has a yellow collar.

Once the threaded connectors are attached to each cable being tested, the gauge needle will move either to the left or to the right. If the needle moves into the blue area on the gauge face, this indicates that air is flowing from the cable where the yellow connector is attached to the cable with the blue connector. If the needle moves to the yellow area on the gauge face, the opposite is true.

Once the threaded connectors are attached to each cable being tested, the gauge needle will move either to the left or to the right. If the needle moves into the blue area on the gauge face, as shown in the illustration below, this indicates that air is flowing from the cable where the yellow connector is attached to the cable with the blue connector. If the needle moves to the yellow area on the gauge face, the opposite is true.

Direction of Flow Indictor Gauge Face


For more information about the Direction of Flow Indicator, refer to our data sheet.