Information on Conductivity Measurement

Conductivity measurement is an easily performed measurement technique for determining and monitoring the total salt concentration in water. It is encountered in many areas of industrial and environmental analysis. Whether it concerns cleaning the filling lines in a dairy, or protection of the cooling water system in a power station, the correct procedures always depend on the conductivity value.This technical publication presents the basic chemical relationships and typical applications in a general, easily understood form. In addition, information will be given on the current state of technology with regard to transmitters/controllers and sensors for this process variable.Our aim is to ensure that the “Information on conductivity measurement” is always kept fully up to date, and therefore invite our readers to provide feedback and share experience and knowledge. Any suggestions or contributions to the discussion will be most welcome.

---

Table of contents :
4 Applications 36……Page 3
8 Appendix 51……Page 4
1.1 General……Page 6
1.2.1 General……Page 7
1.2.2 The cell constant……Page 9
1.2.4 Measurement principles……Page 10
1.2.5 Inductive measuring cell……Page 13
2.1 Arrangement of a process installation……Page 14
2.1.2 Fittings……Page 15
2.1.3 Transmitter/controller……Page 16
2.2.2 Calibration/adjustment……Page 18
2.2.3 Measurement conditions……Page 20
2.2.4 Reference solutions……Page 25
3 Quality assurance……Page 26
3.1 Documentation……Page 27
3.2 Maintenance……Page 28
3.3 Problems / actions……Page 31
3.5 On-site test options……Page 33
3.6 Storage of the measuring cell……Page 34
4 Applications……Page 35
4.2 Galvanizing plants……Page 36
4.3 Beverage bottling plants……Page 37
4.4 Power stations……Page 38
4.5 Pharmaceuticals……Page 41
4.6 Full desalination plants……Page 43
4.7 Concentration measurements……Page 44
5 Closing remarks……Page 47
6 Legal aspects……Page 48
7 Source information……Page 49
8.1 Sample test certificate for the measuring cell……Page 50
8.2 Sample calibration certificate for a transmitter……Page 51