| 摘要 |
A probe for measuring fluid velocity through a conduit has a pitot tube connected to a multiple channel cylindrical tube which is placed within a tubular housing. Drive motors are provided to permit precise rotation and longitudinal movement of the cylindrical tube and attached pitot tube in the conduit, typically a stack or duct. At least one differential pressure gauge is connected to the cylindrical. A computer directs movement of the cylindrical tube, receives differential pressure and static pressure readings from the differential pressure gauge and utilizes that data to calculate flow of the fluid through the conduit. The device is particularly useful for measuring stack gas flow which flow can be utilized to determine emissions of pollutants.
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