Application
Measurement in media with average or high conductivity:
- Separation of media with average conductivity (milk/water)
- Separation of media with high conductivity (alkali/water)
- Drinking water treatment
- Wastewater treatment
Sensors with temperature probes are used in conjunction with conductivity
measuring devices that support automatic temperature compensation:
- Liquiline CM442/CM444/CM448 (only CLS21D)
- Liquiline CM42
- Liquiline CM14 (only CLS21D)
- Liquisys CLM223/253 (only CLS21)
The resistivity in MΩ · cm can also be measured using these transmitters.
Your benefits
- Different designs for optimum adaptation to the process or mounting location
- Installation in pipe or flow assembly
- Compact design
- With plug-in head (IP68 (CLS21D), IP65 (CLS21)) or fixed cable (IP67)
- High chemical, thermal and mechanical resistance
- Manufacturer inspection certificate stating the individual cell constant
Other advantages of Memosens technology
- Maximum process safety owing to non-contact, inductive signal transmission
- Data security thanks to digital data transmission
- Very easy to use as sensor data saved in the sensor
- Recording of sensor load data in the sensor enables predictive maintenance
Measuring principle
Conductivity of liquids is determined with a measuring
arrangement where two electrodes are located in the
medium. An alternating voltage that causes a current
to flow through the medium is applied at these
electrodes. The electrical resistance, or its reciprocal
value - conductance G - is calculated based on Ohm's
law. The specific conductance κ is determined from the
conductance value using the cell constant k, which
depends on the sensor geometry.
Measuring system
A complete measuring system comprises the following components at least:
- The conductively measuring conductivity sensor CLS21D or CLS21
- A transmitter, e.g. Liquiline M CM42
- A measuring cable, e.g. Memosens data cable CYK10 or CYK71 for analog sensors