Generally speaking, the dissolved oxygen in aquaculture water should be kept at 5mg/L~8mg/L, and at least three milligrams per liter at any time. During the breeding process, especially in the high-temperature season, with the increase in feeding amount and the decomposition of organic matter by microorganisms, the demand for dissolved oxygen in the breeding pond is greater, which requires an aerator to adjust the dissolved oxygen in the water body. However, if you simply use oxygenation equipment and add oxygen at regular intervals, it is easy to cause supersaturation of dissolved oxygen in the water body, and the wasted electricity has the risk of causing air bubble disease in farmed animals. Therefore, how to reasonably select dissolved oxygen monitoring equipment and use aeration devices according to the pond conditions has become an important issue.
First of all, the monitoring equipment must be accurate in monitoring and can truly reflect the dissolved oxygen content in the water body. Only by using this as the basis for starting the aeration equipment can we truly achieve a reasonable increase in oxygen. Like the dissolved oxygen sensor of Desun Uniwill, it can monitor the dissolved oxygen value of the aquaculture water in real-time, and it is measured by fluorescence method without calibration. Moreover, compared with the sensor that uses the electrode, it has a faster response speed, is less affected by the salinity of the water body, and the measurement result is more stable. It uses high-quality fluorescent film, which has high precision and long life, which ensures the accuracy of monitoring and reduces the number of equipment maintenance. It can also be used with IoT modules and sensor analyzers to read monitoring data, upload the data to the cloud platform, and link the start and stop of the aerator by setting the dissolved oxygen on and offline, and at the same time through different methods such as phone calls and short messages, to help farmers realize the intelligent management of dissolved oxygen in the water body of the breeding area.
It should be noted that even the best equipment needs to be used correctly. First, please note that the black rubber protective cover should be removed before measurement. Secondly, the fluorescent film at the front of the sensor must avoid collision or scratching. Any damage may lead to a decrease in measurement accuracy, or even unusable. Furthermore, avoid using it in an organic solution, and also avoid using an organic solution to clean the fluorescent film. For long-term storage, the fluorescent film should be kept moist and the temperature should be above zero degrees Celsius. Prevent the fluorescent film from being damaged by freezing. If it is in a dry environment, the storage temperature can be as low as minus ten degrees Celsius. When in use, the device must be soaked in water for 48 hours to restore the response to the fluorescent film.
We recommend that the fluorescent membrane be replaced once a year, and the device should be calibrated before each measurement. For long-term use, it is recommended to calibrate once every three months. The dissolved oxygen saturation point can be calibrated in air, dripping water, or water-saturated air during calibration. Calibrate “0 oxygen point” in saturated anhydrous sodium sulfite solution and the frequency of calibration should be properly adjusted according to different application conditions.
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