Water quality transmitter series products in the sea water aquaculture application program

❶ Introduction to mariculture

Mariculture is a production activity that utilizes shallow coastal mudflats, harbors and sea areas for aquatic economic plants and animals.

In terms of aquaculture varieties, there are fish such as sea bass and grouper, which have delicious meat and are in great demand in the market; shrimp such as South American white shrimp, which are fast-growing and adaptable; and shellfish such as oysters and scallops, which are highly productive and easy to manage. There are various culturing methods, including pond culture, which is suitable for shrimp and crab culture by building ponds around the seashore and regulating water quality, water temperature and other conditions; raft culture, which farms shellfish and algae in shallow areas with the help of floating rafts, making full use of the water space; and net-pen culture, which puts special nets in the open sea to provide fish with a close-to-natural growing environment, which is conducive to the output of high-quality fish.

Pond culture relative to raft culture and net box culture is relatively closed, low mobility of aquaculture water, water quality needs to be adjusted with the help of human intervention. The degree of water quality will directly affect the growth rate and health of fish and shrimp, so the real-time monitoring of water quality is particularly important.

❷ Important water quality parameters

• PH(be) worth

When the pH is lower than 5.5-6, the acidic environment will reduce the mineral accumulation in the shrimp body and decrease the reproduction rate and growth rate, and when the pH is higher than 8.5-9.5, ammonia (NH4+) will turn into ammonia (NH3), which will seriously affect the health of shrimp.

• dissolved oxygen

Dissolved oxygen concentration has a significant effect on the growth and survival of marine shrimp. Studies have shown that at dissolved oxygen concentrations below 2 mg/l, the growth of marine shrimp is significantly inhibited and immune activity is reduced, resulting in slower growth and reduced survival. On the contrary, the growth and survival of marine shrimp were higher and development was better under higher dissolved oxygen concentration.

• temp

The optimum growth temperature for marine shrimp is generally between 20℃ and 30℃. In this range, shrimp metabolism is vigorous, growth is rapid, immunity is stronger, and can reduce the occurrence of disease. For example, South American white shrimp (Penaeus vannamei) can grow normally between 25 and 35 degrees Celsius, but will stop feeding at less than 18 degrees Celsius and die at less than 12 degrees Celsius.

• ammonia nitrogen
  • Toxic effects:Ammonia nitrogen is highly toxic when present as free ammonia (NH3). High concentrations of ammonia nitrogen can lead to respiratory distress, reduced feeding and even death in marine shrimp.
  • Immunosuppression:Ammonia nitrogen weakens the immune system of marine shrimp, making them more susceptible to pathogens and increasing the risk of disease.
  • Growth Disorders:The accumulation of ammonia nitrogen affects the growth and development of marine shrimp, resulting in slow growth and reduced reproductive capacity.
  • Physiological effects:Ammonia nitrogen damages the gills, hepatopancreas and other organs of marine shrimp, affecting their respiration, metabolism and nutrient absorption.

• salinity

Excessively high or low salinity can adversely affect the growth and health of marine shrimp. Excessive salinity can lead to physiological disorders or even death of the shrimp, while too little salinity can lead to a lack of essential minerals, affecting their growth and moulting process.

❸ Analysis of pain points

Traditional pond farming basically relies on "empirical judgment", this way is not only inefficient, and because there is no automatic detection mechanism, it is easy to misjudge the situation, resulting in direct economic losses; on the other hand, the scale of farmers once the development of the face of a huge number of breeding ponds, relying on the empirical judgment of the breeding is There is no way to manage systematically.

❹ Ideas for solutions

Modernized aquaculture relies on advanced Internet of Things (IoT) technology, through the deployment of various types of water quality sensors in aquaculture ponds, real-time collection of numerical changes in various elements of the water body, and through wireless communication, the data will be transmitted to the cloud server (monitoring software); thus realizing real-time viewing of water quality data, historical viewing, real-time early warning, data analysis, and linkage equipment (oxygenator, pumping, rolled-up machine) and other functions; To do water quality abnormalities in advance prediction, early intervention, to avoid losses.

❺ Solutions

Hainan Shidian Technology Co., Ltd. for the aquaculture industry launched a variety of water quality transmitters, which are characterized by compact size, easy to install, high level of protection (IP67) and other advantages; product networking concepts are as follows:

Pond water monitoring:World Power Technology launched a 3-in-1 water quality transmitter, real-time collection of water PH value, dissolved oxygen, water temperature parameters; due to ammonia nitrogen, salinity sensor is relatively high cost, we use the form of building stations to realize a set of sensors to monitor a number of ponds, combined with the IPLC of the world's power technology for real-time data collection and reporting + control, so as to maximize the extent for the farmers to save the construction costs.

Tailwater monitoring:World Power Technology has launched a communication protocol monitoring station that complies with the national standard HJ 212-2017 to monitor the quality of tailwater in real time to monitor compliance with discharge standards and deal with regulators with ease.

❻ Products

𫔩 IPLC

Product Features:

• Supports local expansion of up to 16 I/O modules with fastest 2ms refresh cycle;
• Supports 64 wireless LoRa smart sensing transmitter access;
• Supports 4G and Ethernet network access to the WorldTech Management Cloud Platform;
• Support ModbusRTU/TCP, MQTT and other industrial protocols;
• 9-28V wide voltage supply design;
• LED screen design for intuitive local operation;
• Abundant indicator lights to monitor the working status in real time;
• Graphical programming function for logic control;
• Support multi-point linkage, linkage point control, linkage DO control.
• Reliable, industrial-grade design for a variety of demanding environments;
• Standard 35mm rail mounting;
• Size: 110 x 38 x 116mm;

𫔩 PH Sensor

• Range: 0～14pH
• Accuracy: ±0.1pH, ±0.3°C
• Resolution: 0.01pH
• Power supply: DC12~24V
• Working temperature: 0～50℃
• Output:LoRa
• Installation: input type with 5 meter cable
• Protection class: IP68

𫔩 Dissolved Oxygen Sensor

• Range: 0～20.00mg/L
• Accuracy: ±2%, ±0.3°C
• Resolution: 0.01mg/L, 0.1°C
• Power supply: DC12~24V
• Working temperature: 0～50℃
• Output:LoRa
• Installation: input type with 5 meter cable
• Protection class: IP68

𫔩 Salinity Sensor

• Range: 0～70PSU
• Accuracy: ±1.5%F.S.
• Resolution: 0.1 PSU
• Power supply: DC12~24V
• Working temperature: 0～50℃
• Output:RS485
• Installation: input type with 5 meter cable
• Protection class: IP68

𫔩 Ammonia Sensor

• Range: 0～10.00mg/L
• Accuracy: ±10% or ±1mg/L, ±0.5°C
• Resolution: 0.01mg/L
• Power supply: DC12~24V
• Working temperature: 0～40℃
• Output:RS485
• Installation: input type with 5 meter cable
• Protection class: IP68

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