Operation Manual

8 Determining the installation point
8.1 Reserving the inlet and outlet sections
The thermal measuring principle may be sensible to inlet and outlet
conditions. We recommend the following minimum straight inlet and
outlet sections to ensure an accurate measurement. The S402 should
be always installed upstream from obstacles like valves, filter,
reductions etc. In common, the sensor should be installed as far as
possible away from any disturbances.
Note: If there is any combination of the below situations, the longest
straight inlet section must be maintained.
Expansion Reduction
90° bend 2 x 90° bend
14 S402