The universally usable conductivity measuring cells by WTW set standard in the conductivity measurement. Their 4 electrode technology makes them insensitive to pollution, uninfluenced by polarization effects and therefore precise and reliable in any conditions. For simple applications, there is a cost-effective 2 electrode cell with graphite electrodes available.
Conductivity measuring cells with graphite electrodes in two and four pin models 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 edge field
- Highest precision and linearity
- Long-term stable cell constant thanks to graphite electrodes
Full Product Description
TetraCon® 325 4-electrode conductivity cell with graphite electrodes, integrated temperature sensor, epoxy shaft, 1.5m cable and waterproof plug, cell constant K =0.475/cm, long-term stable cell constant, very high precision and linearity, extremely wide measuring range with only 1 cell, measuring range 1µS/cm to 2S/cm.
Specifications
Model |
LRD 01 |
LRD 325 |
LR 325/01 |
LR 325/001 |
TetraCon® 325 |
TetraCon® DU/T |
|
Order No. |
302220, 302222 |
302225, 302229 |
301961 |
301962 |
301960, 301970, 301971 |
301252 |
|
Measuring principle |
2 electrodes measuring cell |
4 electrodes measuring cell |
2 electrodes measuring cell |
4 electrodes measuring cell |
|||
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 ... |
||
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 |
|
Resolution |
Depends on measuring range |
||||||
Temperature sensor |
Integrated NTC |
||||||
Temperature Measurement |
0 °C ... +130 °C |
0 °C ... +100 °C |
-5 °C ... 80 °C |
0 °C ... 60 °C |
|||
Maximum pressure |
14 bar (at 20 °C) |
10 bar (at 20 °C) |
2 bar |
||||
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 |
||||
Mechanical |
Shaft |
Stainless steel 1.4571 |
Epoxy |
POM |
|||
Kable gland |
Brass, nickel-plated |
— |
— |
— |
— |
||
Connection head |
— |
— |
POM |
— |
|||
Electrodes |
Stainless steel 1.4571 |
Graphite |
Stainless steel 1.4571 |
Graphite |
|||
Protection Rating |
IP65 |
IP68 |
IP65 |
||||
(when connected) |
(Measuring cell until immersion length) |
||||||
Weight (without cable) |
Approx. 350 g |
Approx. 300 g |
Approx. 135 g |
Approx. 280 g |
Approx. 135 g |
Approx. 170 g |