Installation Of Sc41/Sc42/Sc49 Sensors; Typical Installation Of Sc41/Sc42/Sc49 Sensor In Ff40 Flow Fittings/ Fs40 Flow Fitting Assemblies - YOKOGAWA SC4A Instruction Manual

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3.2. 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 (see figure 11). 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 3.6 for ordering information).
If the SC41/SC42/SC49 sensor is supllied with an O-ring, the O-ring in the fitting must be
removed.
3.2.1. Typical installation of SC41/SC42/SC49 sensor 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: Model FF40: Flow fitting
Model FS40: Flow fitting subassembly
When using the sensor in combination with a Flow fitting or Flow fitting subassembly, the process
flow has to be taken into account when mounting the sensor. For an example see figure 12
Reasonable
Good
Bad
Bad
Good
Fig. 12 Mounting position SC41/SC42/SC49 sensor
IM 12D07J01-10E-E