Polymetron 9582 dissolved oxygen analyzer
- typical application
Power plants, semiconductor plants, etc., are suitable for the analysis of dissolved oxygen at low concentration (ppb) such as deaerated water.
-Features and benefits
The pre-installed membrane module only needs a few seconds to replace the membrane
Low detection limit
Quick calibration process: calibration from ppm (air) to ppb (process) can be completed in less than 15 minutes
The universal 9500 controller is used for easy integration and simple installation.
- working principle
The measurement of dissolved oxygen is based on the well-known Clark battery principle. The oxygen-permeable membrane isolates the water sample from the electrode, so there is no need to adjust the sample. Since other reducing or oxidizing ions cannot pass through the gas-permeable membrane, they will not cause interference.
A constant voltage is applied to the two electrodes to keep the potential of each electrode constant. The gold working electrode (cathode) reduces dissolved oxygen to hydroxide ions:
O2 + 2H2O + 4e--> 4OH
The oxidation reaction takes place on the surface of the large silver electrode (anode):
4Ag + + 4Br--> 4AgBr + 4e-
The oxidation-reduction reaction produces a diffusion current, which is proportional to the dissolved oxygen concentration.
Scan the QR code to read on your phone
We could not find any corresponding parameters, please add them to the properties table
|Measuring range||0 ~ 2000 ppb（0-2 ppm）|
|Minimum detection limit||< 1 ppb|
|unit||mg/L, ppm, μg/L, ppb, mbar, hPa,inch Hg, mmHg|
|Repeatability||± 0.5 ppb or ± 2%, whichever is greater|
|Reproducibility||± 0.5 ppb or ± 2%, whichever is greater|
|Response time||For 1-40 ppb step change the value is: <30 seconds|
|Maintenance interval||Membrane life: 6 months, depending on the sample|
|range of working temperature||-20 ~ 60 ° C (0 ~ 95% RH, non-condensing)|
|Temperature compensation||Automatic compensation within 0 ~ 45 ° C (32 ~ 113 ° F)|
|connection||1/4 inch NPT threaded connection (6mm or 1/4 inch pipe is recommended)|
|Sample flow grade||66 ~ 333 mL/min（4 ~ 10 L/hr）|