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Version 2.1
Update: April 2016
PONSEL Mesure
– Aqualabo Contrôle
35 Rue Michel Marion
– 56850 CAUDAN, FRANCE
Tel.: +33(0)2 97 89 25 30
– Fax: +33(0)2 97 76 55 72
7.2.5 C4E sensor: 4-electrode conductivity.
General description
Conductivity: Amperometric measurement with a 4-electrode system;
Temperature: NTC thermistor.
Materials
Graphite, platinum, PVC, POM-C, Polyamide, Stainless steel 316L (sleeve
protecting the temperature sensor); polyurethane sleeve on cable.
Precautions
The 4 electrodes are sensitive to deposits (greases, hydrocarbons, biofilm,
sludges).
Measurement/Interference
When immersing the sensor in the medium to be measured, wait until the sensor's
temperature has stabilized before taking the reading.
Operating temperature
0 °C to 50 °C
Servicing
After each use, rinse the sensor carefully in clean water.
If deposits such as biofilm or sludge persists in the measurement slit or on the
electrodes, use wet abrasive paper to remove a thin layer off the surface of the
electrodes (type P1200 or P220).
Storage
The protective bag absorbs direct impacts on the head of the sensor.
If storing for a short period between measurements, place a wad of cotton wool in
the bottom of the storage bag, dampened with a few drops of buffer solution at
1,413 µS/cm.
Storage temperature
- 10 °C to + 60 °C
Conductivity calibration
Using a clean sensor, perform a 2-point calibration of the sensor (offset and gain
using a standard solution whose conductivity is suited to the measurement range)
for 1 or all 4 ranges:
Measurement range
Concentration of the
standard conductivity
solution
0.0-200.0 µS/cm
84 µS/cm
0-2,000 µS/cm
1,413 µS/cm
0.00-20.00 mS/cm
12.88 mS/cm
0.0-200.0 mS/cm
111.8 mS/cm
Temperature calibration
Refer to section 7.2.1