Conductivity measuring cells to be connected to analog transmitters
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 application - we have the measuring cell! 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).
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.
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Model |
LRD 01 |
LRD 325 |
LR 325/01 |
LR 325/001 |
TetraCon® 325 |
TetraCon® DU/T |
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Order No. |
302220, 302222 |
302225, 302229 |
301961 |
301962 |
301960, 301970, 301971 |
301252 |
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Measuring principle |
2 electrodes measuring cell |
4 electrodes measuring cell |
2 electrodes measuring cell |
4 electrodes measuring cell |
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Measuring Range |
0.001 µS/cm ... 200 µS/cm |
1 µS/cm ... |
0.001 µS/cm ... 200 µS/cm |
0.0001 µS/cm ... 30 µS/cm |
1 µS/cm ... |
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Cell constant |
0.1 cm-1, ±2% |
0.475 cm-1, ±1.5% |
K = 0.1 cm-1 |
K = 0.01 cm-1 |
K = 0.475 cm-1 |
K = 0.778 cm-1 |
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Resolution |
Depends on measuring range |
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Temperature sensor |
Integrated NTC |
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Temperature Measurement |
0 °C ... +130 °C |
0 °C ... +100 °C |
-5 °C ... 80 °C |
0 °C ... 60 °C |
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Maximum pressure |
14 bar (at 20 °C) |
10 bar (at 20 °C) |
2 bar |
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Electrical Connection |
Integrated PU connection cable with 7-pole screw plug (IP 65) |
Integrated cable mit 8-pole plug |
8-pole socket for cable KKDU 325 |
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Mechanical |
Shaft |
Stainless steel 1.4571 |
Epoxy |
POM |
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Kable gland |
Brass, nickel-plated |
— |
— |
— |
— |
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Connection head |
— |
— |
POM |
— |
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Electrodes |
Stainless steel 1.4571 |
Graphite |
Stainless steel 1.4571 |
Graphite |
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Protection Rating |
IP65 |
IP68 |
IP65 |
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(when connected) |
(Measuring cell until immersion length) |
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Weight (without cable) |
Approx. 350 g |
Approx. 300 g |
Approx. 135 g |
Approx. 280 g |
Approx. 135 g |
Approx. 170 g |
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Warranty |
2 years on defects in quality according to § 10 terms of conditions |
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