SFIDK.PS.029.Q3.02 13
4. Sensor installation
Sensor inst.
SITRANS F US SONOFLO
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To ensure optimum performance it is essential that the following instructions are followed.
4.1 Location The SONO 3300/3100 sensor can be installed both inside or outside, even in exposed conditions.
The sensor is suitable for media and ambient
temperatures from −50 to +160°C. Cryogenic
version from −196 to +100°C and high tempe-
rature versions from −40 to +200°C are also
available. Temperature limitations are stated on
the data plate on the sensor.
The enclosure rating is IP 67 or better. SONO
3100 is IP 68 as standard.
When there are large temperature differences
between the media and the ambient conditions,
the sensor must be isolated to prevent 2-phase
flow which will result in measuring inaccuracy.
4.2 Gas bubbles
Avoid quantities of air collecting in the sensor as
these will affect measurement. When air is
present, installation of an air separator upstream
of the meter is recommended.
4.3 Direction of flow
The double arrow marked on the sensor "+" and
"-". + indicates the flow direction if the electrical
connection is made in accordance with the des-
criptions in the handbook.
With partially full pipes or pipes with free outlet,
the flowmeter should be located in a U-tube.
The following installations should be avoided:
• installation at the highest point in the system
• installation in vertical pipes with free outlet
The sensor must always be completely full of
liquid.
4.4 Full pipes
4. Sensor installation
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