Field use of dissolved oxygen electrodes
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We use a portable dissolved oxygen sensor to measure the dissolved oxygen level in the aeration tank. We have used this type of sensor in the laboratory before; it’s used in conjunction with a stirrer. When conducting on-site measurements at that time, since the water is flowing, does the sensor need to remain stationary once it is placed in the water? It still needs to be shaken – how do I control the speed?
There is no need to stir; it just needs to be fixed in one place. If you are concerned about inaccurate measurement results, you can take measurements at multiple points and calculate the average
There are currently three types of dissolved oxygen sensors: the fluorescent type (fast response, long lifespan), the polarographic type (requires preheating, long lifespan), and the galvanic cell type (fast response, short lifespan). This depends on the type of sensor; the fluorescence method does not consume dissolved oxygen in water, and it is unrelated to whether the water is flowing or stationary ； Potentiometry and electrogenesis methods require dynamic water; these sensors consume the dissolved oxygen in water during measurement, and if water is not replaced in a timely manner, it significantly affects the accuracy of the results.