| Description |
Active conductivity probe with auto. temperature compensation |
| Measuring Principle |
The conductivity measurement in electrolytes is made by means of a 2-electrodes-measuring cell. A sine-shaped voltage with a frequency of about 2kHz is put at the measuring electrodes. The current flowing through the measuring object is converted into a voltage which is phase-synchronously rectified, smoothed and then displayed related to 25°C. |
| Cleaning |
The sensor is delivered completely aligned. Slight soilings can be removed by means of a brush. After intensive cleaning of heavily soiled electrodes, the electrode gaps can slightly change and thus influence the measuring result. |
| Re-alignment |
A re-alignment can be easily carried out in two points at 0 mS/cm (dry) and 2,77 mS/cm or 1,47 mS/cm (reference solution) at 25°C by press of a key. |
| Version |
120mm long shaft of PVC-C, 20mm Ø, electrodes of special carbon, integrated electronics, Thermistor temeprature sensor for the conversion of the measuring result related to 25°C. |
| Operation Temperature |
-5 to 70°C |
| Compens.-coefficient |
1.9 linear |
| Accuracy |
FY A641-LF |
0,01 - 5 mS/cm: (± 1% of meas. val. + 0,05 mS)
5 - 20 mS/cm: (± 2% of meas. val. + 0,05 mS) |
| FY A641-LF2 |
5 - 200 mS/cm: (± 1% of meas. val. + 0,05 mS) |
| Nominal Temperature |
22°C ± 2°C |
| Resolution Cond./Temp. |
FY A641-LF |
0,01 mS/cm to choice 0,001 mS/cm/0,01°C |
| 0,1 mS/cm/0,01°C |
| Cell Constant |
approx. 1 cm-1 |
| Min. Immersion Depth |
30 mm |
| Power Supply/Current Consumption |
approx. 8V from ALMEMO-instrument/approx. 3 mA |
| Application |
Order No.FY A641-LF |
Laboratories, 0 to 20 mS (linearized) |
| Order No.ZA 9641-RL |
Ref. solution (2,77 mS) 0,02 mol KCL 250ml |
| Order No.FY A641-LF2 |
Pure water, 0 to 200 mS (linearized) |
| Order No.ZA 9641-RL2 |
Ref. solution (1,47 mS) 0,001 mol KCL 250 ml |
