PROPER INSTALLATION OF INSERTION TYPE FLOW SENSORS For best results, the sensor should be installed with at least ten diameters of straight pipe upstream and ﬁve downstream. Certain extreme situations such as partially-opened valves are particularly difﬁcult and may require ﬁfteen diameters upstream. Horizontal is the preferred installation orientation, since it improves low-ﬂow performance slightly and avoids problems with trapped air. Bottom, top, and vertical pipe installations are all acceptable if required by the piping layout. Align the conduit housing with the centerline of the pipe, as shown. Be sure the arrow on the housing points in the direction of ﬂow. NOTE: These are general instructions, refer to SeaMetrics manual for speciﬁc installation instructions.
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