Operation Manual

6. Installation considerations

In order to maintain the accuracy stated in the technical data, the

sensor must be installed inline and fitted to tubes with the same

diameter. Please make sure it exists unhindered flow characteristics.

Unhindered flow characteristics are achieved if the section in front of the

sensor (inlet) and behind the sensor (outlet) is sufficiently long,

absolutely straight and free of obstructions such as edges, seams,

curves etc..

Please consider that enough space exists at your site for a adequate

installation as described in this manual.

ATTENTION!

Wrong measurement is possible, if the sensor is not

installed correctly.

• Careful attention must be paid to the design of the inlet and outlet

section. Obstructions can cause counter-flow turbulence as well as

turbulence in the direction of the flow.

• The sensor is for indoor use only! At an outdoor installation, the

sensor must be protected from solar radiation and rain.

• It is strongly recommend not to install S 421 permanently in wet

environment as it exists usually right after a compressor outlet.

S 421 13