Working principle and introduction of dissolved oxygen meter
Dissolved oxygen is the most important water quality indicator in pond aquaculture. The respiration of fish depends on the dissolved oxygen content in the water. If the oxygen content in the water is too low, fish will not be able to grow normally. The dissolved oxygen content required for the normal growth of mainly farmed fish is generally above 4-5mg/L. At this time, fish have good feeding, fast growth, and high feed utilization efficiency. When the dissolved oxygen is below this value, the feeding and growth of fish will be affected to a certain extent. Especially when the dissolved oxygen is below 2mg/L, fish basically stop feeding. When the dissolved oxygen is below 1mg/L, fish will float their heads. When the dissolved oxygen is below 0.5mg/L, fish can suffocate and die. If the dissolved oxygen is too high, it generally does not pose much harm to fish, but deep supersaturation of dissolved oxygen can sometimes cause bubble disease and consume too much energy.
This dissolved oxygen analyzer is specifically designed for automated control of dissolved oxygen content. This dissolved oxygen analyzer can accurately measure the dissolved oxygen content and water temperature in fish ponds, and can automatically control the start and stop of the aerator according to the user's set startup and shutdown limits. The dissolved oxygen analyzer includes functions such as setting on/off limits, calibrating oxygen sensors, measuring and displaying dissolved oxygen content, measuring and displaying water temperature, alarming and displaying sensor faults, manual operation and display, and RS232 transmission of sensor measurement values. The correct use of this dissolved oxygen analyzer can make the dissolved oxygen content in fish ponds suitable, ensure the normal growth of fish, reduce the occurrence of fish diseases, improve the utilization rate of fish feed, save manpower and electricity, and reduce breeding costs.
working principle
The dissolved oxygen analyzer uses primary battery type oxygen sensors and integrated circuit temperature sensors, which have high measurement accuracy and fast response speed. The relay is normally open and can control the intermediate relay of the aerator. When the detected dissolved oxygen content is lower than the set startup limit, the output relay is activated to control the operation of the intermediate relay of the aerator, thereby starting the aerator to work. When the detected dissolved oxygen content exceeds the set shutdown limit, the output relay will disconnect, prohibiting the operation of the intermediate relay of the aerator and thus stopping its operation. The aerator tester is equipped with a sensor fault alarm function, which can generate sound and light alarms when the sensor fails, and control the aerator to work at intervals of about 30 seconds. The dissolved oxygen analyzer is equipped with a manual work button, which can control the operation of the aerator at any time.
