Installation
MXD70 Electrodeless Conductivity
Setup and Operating Guide
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Installation
Installation and Choice of Electrodeless
Conductivity Sensors
The choice of the correct type of electrodeless conductivity sensor and how and where to mount the
sensor, so that it has a representative sample of solution are probably the two most important
considerations when installing a conductivity system.
The following criteria are of great importance during selection:
The choice of the best method of measurement
Use of the correct materials for temperature and corrosion resistance
Position of sensor for robustness and service access
Ensuring a representative, uncontaminated solution sample
The electrodeless method of measuring conductivity has many advantages over conventional
methods in particular the sensors will operate with virtually zero maintenance and provide reliable
measurements over extended periods of time.
LTH provides a selection of electrodeless sensors in a variety of materials including PEEK
TM
a food grade
material with excellent chemical resistance and high temperature performance. Contact LTH
Electronics or your local distributer for more information.
To ensure correct sensor mounting the following conditions should be observed:
The solution around the sensor is representative of the solution as a whole.
For best performance line up the cross hole with direction of flow.
A moderate flow is maintained to provide an “up to date” sample. Excessive flow rates, however, can
cause cavitations and turbulence within the sensor, which will result in inaccurate readings.
The sensor is mounted so that air bubbles do not lodge within it - displacing solutions and affecting
the sample volume (air is not conductive).
Similarly it must be in a position so that sludge and particulate matter does not collect within the
sensor.
The electrodeless sensor will need a minimum clearance around it when installed or making
measurements in a sample. Do not rest it on the bottom of a tank or vessel. See the following figures
for details.
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