How to Use Dissolved Oxygen Meter Effectively

The dissolved oxygen meter is a device for measuring dissolved oxygen in water. Its  working principle is that oxygen is reduced by the working electrode through the diaphragm, and a diffusion current proportional to the oxygen concentration is generated. By measuring this current, the dissolved oxygen concentration in the water can be obtained.

How to use desktop dissolved oxygen meter effectively

1. The electrode should be cleaned once every 1 to 2 weeks. If there are contaminants on the diaphragm, it will cause measurement errors. When cleaning, taking care not to damage the diaphragm. Rinse the electrode in clean water. If the dirt cannot be washed away, carefully scrub it with a soft cloth or cotton cloth.

2. The zero point and span should be re-calibrated once in 2-3 months.

3. The regeneration of the electrode should be carried out about once a year. When the measurement range cannot be adjusted, it is necessary to regenerate the dissolved oxygen electrode. Electrode regeneration includes replacing the internal electrolyte, replacing the diaphragm, and cleaning the silver electrode. If the silver electrode is observed to be oxidized, it can be polished with fine sandpaper.

4. If the electrode of DO meter leaks during use, the electrolyte must be replaced.

Dissolved oxygen testing is a very important indicator of water quality detection. The portable dissolved oxygen meter can be applied for water environment monitoring, fishery, sewage discharge control and laboratory detection of BOD, etc.