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HomeProductsProduct categoriesSensor technologyAnalog sensors (on-line) > Conductivity measuring cells

Analog conductivity measuring cells

WTW analog sensors - conductivity measuring cells
WTW sensors universal conductivity measuring cell TetraCon® 325
WTW analog sensors - conductivity measuring cells LRD 01-1,5
WTW analog sensors - conductivity measuring cells LRD 325-1,5
WTW sensors pure water conductivity measuring cell LR 325/01
WTW sensors pure water conductivity measuring cell LR 325/001

All analog conductivity measuring cells are equipped with an integrated temperature compensation and cover all applications

  • In wastewater treatment plants, as flow measurement or in the pipeline: The right solution for every application
  • Highest linearity by 4 electrode measuring cell
  • High operational safety by robust design

You have the application - we have the measuring cell! With the conductivity measuring cells by WTW, measurements of 0.0001 µS/cm to 2 S/cm are not a problem. The unique 4 electrode measuring cell compensates for possible contamination and polarization effects. All measuring cells can be connected to the LF monitor LF 298 NTC (exception: TetraCon® 700).

TetraCon® 700 – Designed as an immersion encoder specifically for use in wastewater treatment plants
Conductivity measuring cell with 4 electrode system, integrated temperature sensor, anti-slip electrodes and breakage-resistance shaft; measuring range 10 µS/cm to 1000 mS/cm.
Only as replacement armature for analog monitors of the Ecoline® or QuadroLine® series. Still available as digital version (IQ Sensor Net System 181).

TetraCon® 325 – for universal applications
4 electrode measuring cell with graphite electrodes and integrated temperature sensor, measuring range 1 µS/cm to 2000 mS/cm.

LRD 01 – for the installation into pipelines
Conductivity measuring cell as V4A model. With integrated temperature sensor (up to 130 °C), measuring range 0.001 to 200 µS/cm, pressure-resistant to 14 bar, 1/2 inch NPT screw thread.

LRD 325 – for the installation into pipelines
Conductivity measuring cell with integrated temperature sensor (up to 100 °C). Measuring range 1 µS/cm to 2 S/cm, pressure-resistant to 10 bar, 1/2 inch NPT screw thread.

LR 325/01 – for pure water measurement
Pure water measuring cell with integrated temperature sensor and flow vessel, measuring range 0.001 to 200 µS/cm. Especially suited for the measurement of low conductivity values such as in boiler infeed water.

LR 325/001 – for trace measurement, also in partial and non-waterous media
High resolution trace conductivity measuring cell with integrated temperature sensor and flow vessel, measuring range 0.0001 to 30 µS/cm.

Variations

Model Description Order no.
TetraCon® 700-7 Universally usable 4 electrode measuring cell, especially suited for wastewater treatment plants, with integrated temperature sensor, cable length 7 m 302316
TetraCon® 700-15 Like TetraCon® 700-7, but cable length 15 m 302318
TetraCon® 700-15 SW Like TetraCon® 700-7, but cable length 15 m, Salzwasser-Version 302317
TetraCon® 700-SO* Like TetraCon® 700-7, but cable length frei wählbar 302319V
TetraCon® 325 4 electrode measuring cell, with integrated temperature sensor, cell constant K=0,475 cm-1, cable length 1.5 m 301960
TetraCon® 325-3 Like TetraCon® 325, but cable length 3 m 301970
TetraCon® 325-6 Like TetraCon® 325, but cable length 6 m 301971
LRD 01-1.5 2 electrode measuring cell to screw into pipelines, with integrated temperature sensor, cable length 1.5 m 302220
LRD 01-7 Like LRD 01-1.5, but cable length 7 m 302220
LRD 325-1.5 4 electrode measuring cell to screw into pipelines, with integrated temperature sensor, cable length 1.5 m 302225
LRD 325-7 Like LRD 325-1.5, but cable length 7 m 302229
LR 325/01 Conductivity measuring cell for pure water, with integrated temperature sensor, cell constant K=0.1 cm-1, glass flow vessel 301961
LR 325/001 Conductivity measuring cell for trace measurement, with integrated temperature sensor, cell constant K=0.01 cm-1, stainless steel flow vessel 301962

Technical Data

Analog conductivity measuring cells _H _H _H
Model TetraCon® 700 (SW) LRD 01 LRD 325
Measuring principle 4 electrode measuring cell 2 electrode measuring cell 4 electrode measuring cell
Measuring range 10 µS/cm … 1000 mS/cm 0,001 µS/cm… 200 µS/cm 0.001 µS/cm… 200 µS/cm
Cell constant K=0.917 cm-1 (in free solution) K=0.933 cm-1 (with flow fitting EBST 700-DU/N) K=0.1 cm-1 K=0.475 cm-1
Temperature sensor Integrated NTC _H _H
Temperature measurement 0 … +50 °C 0 … +130 °C 0 … +100 °C
Max. pressure 10 bar (at 20 °C) 14 bar (at 20 °C) 10 bar (at 20 °C)
Conductivity measuring cells for special applications _H _H _H
Model TetraCon® 325 LR 325/01 LR 325/001
Measuring principle 4-electrode measuring cell 2-electrode measuring cell 2-electrode measuring cell
Measuring range 1 µS/cm … 2 S/cm 0.011 µS/cm … 200 µS/cm 0.0001 µS/cm … 30 µS/cm
Cell constant K=0.475 cm-1 K=0.1 cm-1 K=0,01 cm-1
Temperature sensor integrated _H _H

Accessories

Model Description Order no.
ADA-LF-DN 20 PVC gluing sleeve with ½ inch NPT thread for the installation of the LRDo1/LRD 325 into DN 20 pipes 303203
EST-LRD V4A stainless steel welding stud (1.4571) ½ inch NPT for the pipe mounting of the conductivity probe LRD 01/LRD 325 303209
ADA/AMPH-LAB-LF Adapter to connect conductivity measuring cells of the series LR 325, TetraCon® 325 and TetraCon® DU/T to LF monitor of the series EcoLine® 303212
ADA/AMPH-LF Adapter for the direct connection of conductivity measuring cells of the series TetraCon® 700 and LRD to LF monitors of the series QuadroLine® 303215
ADA/LAB-LF Adapter for the connection of conductivity measuring cells of the series LR 325 and TetraCon® 325 to LF monitors of the series QuadroLine® 303216

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