© PCE Instruments
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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 know ledge about the pipes / the plumbing
system is necessary.
The ideal location w ould be an infinitely long, straight pipe, w hereas 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 follow ing chart show s examples of good positions:
Pipe routings and sensor position
Upstream
Dow nstream
L
up
x
ø
L
dn
x
ø
10D
5D
10D
5D
10D
5D
12D
5D
20D
5D
20D
5D
30D
5D
E
n
g
li
s
h
