Instructions

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5.3 Sensors

Selection of sensor position

The first step before installation should be finding a suitable position to place the sensors. This is a

requirement for accurate measurement results. Some basic knowledge about the pipes / the

plumbing system is necessary.

The ideal location would be an infinitely long, straight pipe, whereas there must be no entrapped air

(air bubbles) in the liquid. The pipes can either run vertically or horizontally. To avoid inaccuracies

due to turbulence in the liquid, a straight flow-calming section before and behind the measuring point

should be considered. In general, the section in front of the measuring point should be at least 10 x

the pipe diameter and after the measuring point, it should be 5 x the pipe diameter.

The following chart shows examples of good positions:

Pipe routings and sensor position

Upstream

Downstream

x ø

10D

12D

20D

30D