Four electrode conductivity cells for universal applications
Conductivity measuring cells with graphite electrodes with four electrodes for standard measurements in aqueous solutions in the field and in the lab
- No measuring errors due to cable, polarization effects or changes of the electrical boundary field
- Highest precision and linearity
- Long-term stable cell constant thanks to graphite electrodes
Four -electrode conductivity cell with built-in temperature sensor, IP 68 (2 bar), cell constant K = 0.475 cm-1
TetraCon® 325: 1.5 m cable and waterproof plug
TetraCon® 325-3: 3 m cable and waterproof plug
TetraCon® 325-6: 6 m cable and waterproof plug
TetraCon® 325-10: 10 m cable and waterproof plug
TetraCon® 325-15: 15 m cable and waterproof plug
TetraCon® 325-20: 20 m cable and waterproof plug
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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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