ENDRESS+HAUSER  CLS19-A1A1D

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.

• Installation in pipes or flow chambers
• Pt 100 temperature sensor for temperature compensation
• Compact design
• Very good price

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.