Analyzers, in-situ sensorsand samplers

Measuring parameter overview

7

Measuring principles

.............................Page 8

Potentiometric measuring principle...................Page 5

Measuring principle UV absorption....................Page 5

Based on an ion-selective membrane on which ammonium and nitrate ions accumulate thereby causing an electrical potential to build up.

Based on an absorbance measurement at two fixed wavelengths in UV.

Colorimetric measuring principle........................Page 4 Reagents are added to the

Measuring principle UV-VIS spectrometry.........Page 4 Based on an absorbance measurement at various wave

water sample to “dye” it. After wards the sample is measured by photometric means.

lengths. The absorbance measured is correlated to the concentration of various substances using data models.

.............................Page 13

Colorimetric measuring principle........................Page 4

Measuring principle UV/infrared absorption.....page 5

Reagents are added to the water sample to “dye” it. After wards the sample is measured by photometric means.

Based on absorbance measure ment at defined wave lengths. • UV: UV light is shone through the measurement section and the absorption is measured at two fixed wavelengths (SAC). • IR: The sample is combusted and the combustion gas is cooled down. Afterwards the CO 2 content is determined by IR absorption and used to calculate the TOC value.

Measuring principle UV-VIS spectrometry.........Page 4 Based on an absorbance measurement at various wave

lengths. The absorbance measured is correlated to the concentration of various substances using data models.

Colorimetric measuring principle........................Page 4

.............................Page 16

Potentiometric measuring principle...................Page 5

Reagents are added to the water sample to “dye” it. After wards the sample is measured by photometric means.

Based on an ion-selective membrane on which sodium ions accumulate thereby causing an electrical potential to build up.

Samplers Samplers provide automatic sampling, defined distribution and preservation of liquid samples. They guarantee that these samples remain undistorted until they are analyzed in the laboratory. The Liquistation CSF48 and Liquiport CSP44 samplers can easily be equipped with sensors for online measurement of various parameters. They can also be seamlessly integrated into process control systems.

Applications.........................................................Page 19 • Municipal and industrial wastewater treatment plants • Laboratories and water authorities • Monitoring of liquid media in industrial processes