Tecfluid FLOMAT Series - Manual (Page 4)

Downstream from the sensor, the minimum recommended distance from a disturbing
element is 5 x DN.
3.2 Straight pipe sections
The point where the Flomat will be installed must be a straight pipe section, separated
from elements that can disturb the flow profile, such as elbows, diameter changes, etc.
Depending on the element the minimum necessary distances upstream from the sensor
must be (BS 1042-2.2:1983 standard):
3.1 Sensor position
The most adequate position is in the side of the pipe. In this way, deposits of particles on
the electrodes and air pockets at the top of the pipe are avoided.
60º
60º
Type of disturbance upstream from the
sensor Minimum distance between
the sensor and the element
90° elbow or T-bend 50 x DN
Several 90° coplanar bends 50 x DN
Several 90° non-coplanar bends 80 x DN
Total angle convergent 18 to 36° 30 x DN
Total angle divergent 14 to 28° 55 x DN
Fully opened Butterfly valve 45 x DN
Fully opened plug valve 30 x DN
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