ENDRESS+HAUSER  CLS15-A1A1A

Measurement in pure and ultrapure water range:

• Monitoring of ion exchangers
• Reverse osmosis
• Distillation
• Chip cleaning

Sensors with temperature probes are used in conjunction with conductivity measuring devices that support automatic temperature compensation:

• Liquiline CM442/CM444/CM448 (only CLS15D)
• Liquiline CM42
• Liquiline CM14 (only CLS15D)
• Liquisys CLM223/253 (only CLS15)
• Mycom CLM153 (only CLS15)

The resistivity in MΩ · cm can also be measured using these transmitters.

• High measuring accuracy as cell constant is individually measured
• Installation in pipe or flow assembly
• Compact design
• With plug-in head (IP68 (CLS15D), IP67 (CLS21)) or fixed cable (IP67)
• Easy to clean thanks to electropolished surfaces
• Sterilizable up to 140 °C (284 °F)
• Stainless steel 1.4435 (AISI 316L)
• Quality certificate stating the individual cell constant
• Inspection certificate EN 10204 3.1 (optional)

• 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
• Predictive maintenance possible as sensor load data logged in the sensor

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.

A complete measuring system comprises the following components at least:

• The conductively measuring conductivity sensor CLS15D or CLS15
• A transmitter, e.g. Liquiline M CM42
• A measuring cable, e.g. Memosens data cable CYK10 or CYK71 for analog sensors