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The linearity and accuracy of the FP-6000 Series
sensor depend on predictable flow conditions in
the pipe and proper location of the fitting. As
with any insertion flow sensor, the pipe must be full
and generally free of air pockets.
2.1 Location of Fitting
The sensor must be located in a free-flowing
straight run of pipe. OMEGA recommends a
minimum of 10 pipe diameters of straight pipe
upstream and a minimum of 5 diameters down-
stream to insure a fully developed flow profile.
Any obstructions to the flow will require consider-
ably longer straight runs. Figure 1 illustrates
several common situations and recommended
piping distances.
2
Chapter 2
Installation and
Wiring
2.2 Sensor Position
When installing the sensor in a horizontal pipe run
the optimum position is at 0° or 180°, assuming
the line is always full and contains no solids.
Air pockets or sediment in the line will disturb the
rotation of the paddlewheel, causing inaccuracy in
the calibration. Installing the sensor at an angle
Figure 1
Sensor upstream/
downstream mounting
requirements
15 X I.D. 5 X I.D.
Reducer
Flange
40 X I.D. 5 X I.D.
2 x 90° Elbow
3 dimensions
20 X I.D. 5 X I.D.
90° Elbow
50 X I.D. 5 X I.D.
Valve/Gate
10 X I.D. 5 X I.D.
25 X D 5 X I.D.
2 x 90°
Elbow
Inlet OutletInlet Outlet