How to choose a dissolved oxygen sensor for fish farming aquaculture?

Oxygen dissolved in water dissolves oxygen in water in a molecular state. The dissolution and decomposition of oxygen in water is a dynamic and reversible process. The content of saturated dissolved oxygen in water is affected by the comprehensive influence of atmospheric oxygen partial pressure, water temperature and other solute content in water. All aerobic organisms can no longer survive, grow and reproduce without oxygen. The oxygen content in the air is high and stable, accounting for about 21%, so organisms on land are rarely threatened by lack of oxygen. However, aquatic animals face the threat of low dissolved oxygen. Because the saturation of dissolved oxygen in fresh water is only one-twentieth of the oxygen content in air, and less in seawater. Therefore, in the aquaculture industry, the content of dissolved oxygen is one of the important parameters that need to be paid attention to. It is very necessary to choose a reliable Dissolved Oxygen Sensor. Daruifuno's OPD700 dissolved oxygen sensor adopts the principle of fluorescence method, with accurate measurement and stable data, suitable for freshwater and seawater aquaculture.

The harm of lack of oxygen to aquatic organisms
When the dissolved oxygen in the water is insufficient, firstly it will have a direct adverse effect on the farmed animals; secondly, it will indirectly affect the farmed animals by affecting other biological and physical and chemical indicators of the water environment, causing different degrees of harm to their growth, reproduction and even survival. The lighter ones lose their physique and their growth rate slows down, but the water head floats and the pond floods, causing a lot of death.

In China, fishery water standard stipulates that in aquaculture water for 24 hours continuously, the dissolved oxygen must be greater than 5mg/l, and the dissolved oxygen must not be lower than 3mg/l at any time for more than 16 hours. Different countries will have different standards. In aquaculture production, control direct or indirect aeration measures to ensure that the farmed animals are in a good dissolved oxygen environment to achieve the best production efficiency and avoid cost waste caused by excessive aeration. So how to effectively monitor the dissolved oxygen value of water? The OPD700 dissolved oxygen sensor launched by Daruifuno is specially designed for aquaculture water. Compared with industrial processes and sewage environments, the cost of dissolved oxygen sensors for aquaculture is low.

OPD700 Dissolved Oxygen Sensor Features
Lightweight and compact design, easy to carry
RS485 interface, configurable Modbus communication protocol
Titanium housing, also suitable for marine aquaculture
Protection class IP68, can work continuously and stably under water
With a temperature sensor, it can perform temperature compensation, and can set salinity and air pressure compensation
Internally store calibration data, support offline calibration, plug and play

In addition to dissolved oxygen sensors, we also have salinity sensors, pH sensors, etc. suitable for farming. Delfino focuses on the R&D, production and sales of water quality analysis instruments. Its main products include online pH ORP analyzer, conductivity analyzer, turbidity analyzer, dissolved oxygen analyzer, COD analyzer, ammonia analyzer, chlorine analyzer, etc. If you need water treatment related products, please contact us.