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3. INSTALLATION OF SC41/SC42/SC49 sensors
To install the SC41/SC42/SC49 conductivity sensors in a permanent or semi-permanent
location, Yokogawa can supply a range of flow and immersion fittings. These fittings and
sub-assemblies are available in different materials to give the best solution for any
process considering chemical resistance, pressure and temperature specifications.
Flow fittings are available with optional flange adapters. When installing the
SC41/SC42/SC49 sensor in a fitting, an O-ring is necessary. This O-ring is available in
different materials to improve chemical resistance (see Section 8 for ordering information).
If the SC41/SC42/SC49 sensor is supplied with an O-ring, the O-ring in the fitting must be
removed.
3.1 Typical installation of SC41/SC42/SC49 sensor in FD40 Immersion fitting
The immersion fittings are for installing the SC41/SC42/SC49 sensor in tanks, open
vessels or drains. If the fitting is mounted in a tank with agitator or if it is placed in a fast-
flowing process, care must be taken that the fitting is adequately supported. For this
reason, mounting several flanges can be ordered. For more detailed information see GS
and IM of Immersion fitting, Flow fittings and sub-assemblies for series FF40, FS40 FD40.
3.2 Typical installation in FF40 Flow fittings/ FS40 Flow fitting assemblies
From a practical point of view, the best mounting place for a conductivity sensor is in a by-
pass with a sample valve. For these applications the following Flow fittings/Flow fitting
subassemblies are ideal
When using the sensor in combination with a Flow fitting or Flow fitting subassembly, the
process flow must be considered when mounting the sensor. For an example see figure 5.
Figure 5: Mounting position SC41/SC42/SC49 sensor
IM 12D07J01-01EN-P
: Model FF40; Flow fitting
: Model FS40: Flow fitting subassembly
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