Application
Measurement in pure and ultrapure water:
- Monitoring ion exchangers
- Reverse osmosis
The measuring range of the sensors depends on the cell
constant k:
- k = 0.01 cm –1 : 0.04 to 20 μS/cm
- k = 0.1 cm –1 : 0.1 to 200 μS/cm
Sensors with a Pt 100 temperature sensor are used together with
conductivity transmitters equipped with automatic temperature
compensation:
- Liquiline M CM42
- Liquisys M CLM223/253
For measurement of specific resistance, MΩ · cm measuring
ranges are available in the menus of these transmitters.
Your benefits
- Installation in pipes or flow chambers
- Pt 100 temperature sensor for temperature compensation
- Compact design
- Very good price
Measuring principle
The conductivity of liquids is measured with the
following measurement setup: Two electrodes are
immersed in the medium. An AC voltage is applied to
these electrodes which generates a current in the
medium.
The electric resistance or its reciprocal value, the
conductance G, is calculated according to Ohm’s law.
The specific conductivity κ is determined using the
cell constant k that is dependent on the sensor
geometry.