Solar Powered Buoy Control System

JW-MF-520(K40) Solar Powered Water Quality Monitoring Buoy is an integrated floating platform designed for continuous online water quality monitoring in rivers, lakes, reservoirs, aquaculture areas, water sources and industrial water environments.

The system combines a floating buoy, solar power supply, lithium battery, water quality sensors, data acquisition and wireless communication into one field monitoring platform.

Depending on project requirements, the buoy can integrate different sensors for dissolved oxygen, pH, ORP, conductivity, turbidity, nutrients, algae and other water quality parameters.

Data can be transmitted remotely through standard 4G communication, with NB-IoT available as an option, allowing the buoy to operate as part of a wider Smart Water & Environmental Monitoring system.

1. Product Description

The JW-MF-520(K40) Online Water Quality Monitoring Buoy is designed to collect water quality data directly from rivers, lakes, reservoirs and other surface-water environments without requiring a conventional land-based monitoring station at every measurement point.

The buoy can integrate different water quality sensors according to monitoring objectives. Available parameters include:

• Dissolved Oxygen (DO)
• pH
• ORP
• Conductivity
• Turbidity
• COD
• BOD
• TOC
• Total Nitrogen (TN)
• Total Phosphorus (TP)
• Ammonia Nitrogen
• Chlorophyll
• Blue-Green Algae
• Residual Chlorine
• Salinity
• Nitrate
• Fluoride
• Calcium
• Potassium
• Copper

The final sensor configuration should be selected according to the water body, monitoring objective and project requirements rather than installing every available parameter on every buoy.

Projects requiring individual probes rather than a complete floating station can also explore JW-IoT’s full range of Water Quality Sensors.

2. How the Water Quality Monitoring Buoy Works

A water quality monitoring buoy integrates sensing, power supply, communication and field deployment into one floating monitoring point.

A typical monitoring architecture is:

Water Quality Sensors → Data Acquisition → Buoy Controller → 4G / NB-IoT → Server → Monitoring Platform

Water Quality Measurement

Selected sensors are installed on the buoy and immersed in the target water body.

Depending on the monitoring objective, the system can combine different measurements.

For example:

• Dissolved oxygen for aquatic environmental monitoring
• pH for acidity and alkalinity changes
• Conductivity or salinity for dissolved ionic conditions
• Turbidity for suspended particle changes
• Chlorophyll or blue-green algae for biological monitoring
• Ammonia nitrogen or nitrate for nutrient monitoring

For dedicated turbidity applications, see the Online Turbidity Sensor.

For cyanobacteria-related monitoring, JW-IoT also provides an Online Blue-Green Algae Sensor.

Data Acquisition

Sensor measurements are collected by the buoy control system according to the configured monitoring interval.

The default measurement interval is 30 minutes and can be configured down to a minimum of 6 minutes when the application requires more frequent measurements.

Wireless Transmission

Collected data can be transmitted remotely through:

• 4G wireless communication — standard
• NB-IoT — optional

The system transmits monitoring data to the server in HEX format.

Solar Power Supply

The monitoring buoy uses a 13 W, 18.2 V solar panel together with a 72 Ah lithium battery and controller.

This solar-plus-battery configuration is intended to support unattended monitoring at field sites where mains electricity may not be conveniently available.

Remote Monitoring

When connected to the JW-IoT monitoring platform, users can access functions such as:

• Remote water quality monitoring
• Data visualization
• Historical data records
• Trend graphs
• Threshold alarms
• Remote system management

This allows the buoy to operate as part of a wider smart water and environmental monitoring system instead of functioning only as an isolated sensor station.

3. Technical Specifications

4. Multi-Parameter Water Quality Monitoring

Different water monitoring projects require different combinations of sensors.

For example, an aquaculture project may focus on parameters related to the aquatic environment, while a reservoir monitoring project may require a different combination of physical, chemical or biological indicators.

The JW-MF-520(K40) therefore uses an expandable sensor architecture rather than a fixed single-parameter configuration.

Common Monitoring Parameters

Basic physicochemical parameters

• pH
• ORP
• Conductivity
• Dissolved Oxygen
• Turbidity
• Salinity

Nutrient-related parameters

• Ammonia Nitrogen
• Nitrate
• Total Nitrogen
• Total Phosphorus

Organic pollution indicators

• COD
• BOD
• TOC

Biological water quality indicators

• Chlorophyll
• Blue-Green Algae

Additional supported parameters can be selected according to project requirements.

When requesting a quotation, customers are recommended to specify the water body, required parameters, communication requirement and monitoring interval so that the sensor configuration can be matched to the application.

5. Why Use a Solar Powered Water Quality Monitoring Buoy?

Traditional monitoring points are often installed on riverbanks, platforms, bridges or dedicated monitoring structures. These approaches are suitable for many projects, but they are not always practical when measurements need to be collected directly from open water.

A floating monitoring buoy provides another deployment option.

Monitoring Directly on the Water

The sensors remain in contact with the target water body while the buoy stays at the selected monitoring position through its anchoring system.

Reduced Dependence on Shore-Side Infrastructure

Solar power and wireless communication reduce the need for local mains electricity and wired communication infrastructure.

Distributed Monitoring

Multiple buoys can be deployed at different locations when a project needs more than one monitoring point.

This can be useful for large reservoirs, lakes, water-source areas and other projects where water quality conditions need to be observed at different locations.

Remote Data Access

Wireless transmission allows field measurements to be collected centrally instead of relying entirely on manual site visits for data retrieval.

6. Application Scenarios

River Water Quality Monitoring

The buoy can be deployed at selected river monitoring points to collect continuous water quality data.

Depending on the project, parameters such as pH, conductivity, dissolved oxygen, turbidity or nutrient indicators can be integrated.

Lake Monitoring

Lakes can require monitoring at locations away from the shoreline.

A floating monitoring platform allows sensors to be positioned directly in the target water area while transmitting measurements remotely.

Reservoir Water Quality Monitoring

Reservoir projects may require long-term monitoring of changing water conditions.

The solar-powered buoy can provide a dedicated online monitoring point without requiring mains power at the buoy location.

Water Source Monitoring

The system can also be configured for environmental water-source monitoring projects requiring continuous measurements and remote access to data.

Aquaculture Water Monitoring

Water conditions are important to aquaculture management.

The buoy can integrate selected water quality sensors and continuously send monitoring data to a remote platform, helping operators observe changes without relying exclusively on manual sampling.

Industrial Water Monitoring

For appropriate industrial water or effluent monitoring applications, selected water quality sensors can be integrated into the buoy platform to support remote observation and historical data collection.

7. Floating and Anchored Deployment

The JW-MF-520(K40) is designed for floating deployment.

The system uses a bottom anchor together with a 10 m nylon rope to stabilize the monitoring position.

During installation, the anchoring arrangement should be selected according to the actual:

• Water depth
• Water-level variation
• Current conditions
• Monitoring location
• Site environment

The rope length should be adjusted to suit the installation location so that the buoy can remain floating while maintaining the intended monitoring position.

Site conditions should always be evaluated before final deployment.

8. Solar Power for Remote Monitoring Sites

Remote environmental monitoring locations may not have convenient access to mains electricity.

The JW-MF-520(K40) integrates:

• 13 W / 18.2 V solar panel
• 72 Ah lithium battery
• Power controller

The current product configuration is designed to maintain monitoring operation through combined solar generation and battery storage.

According to the existing system specification, the battery and solar configuration can support extended operation during periods of limited sunlight, although actual field autonomy will depend on factors such as communication frequency, sensor configuration, sampling interval, solar conditions and system power consumption.

For long-term deployment, the solar panel and battery system should be inspected periodically as part of routine maintenance.

9. Data Communication and System Integration

The buoy is not only a floating sensor carrier. It is designed to work as part of a remote water quality monitoring architecture.

A typical system can include:

Water Quality Sensors → Buoy Data Acquisition → 4G / NB-IoT → Server → Monitoring Platform

RS485 Modbus RTU

The RS485 Modbus RTU interface provides a standard method for integrating supported digital sensors with the buoy controller.

4G Wireless Transmission

4G is the standard remote communication option for transmitting field data to the server.

10. Maintenance Considerations

Even low-maintenance water quality monitoring systems still require periodic inspection.

Recommended field checks include:

• Cleaning and checking the solar panel
• Inspecting the buoy and anchoring system
• Checking sensor surfaces for fouling
• Inspecting the battery and power system
• Checking cables and waterproof connections
• Confirming data transmission
• Performing sensor maintenance or calibration according to the specific sensor requirements

Optional self-cleaning sensor configurations can help reduce fouling-related maintenance for suitable applications.

Actual maintenance frequency depends on the installed sensors and water environment.

11. How to Configure the Right Monitoring Buoy

Because water quality projects differ significantly, the buoy should be configured according to the monitoring objective instead of selecting sensors only by the number of available parameters.

Before requesting a system configuration, determine the following:

1. What type of water body will be monitored?

For example:

• River
• Lake
• Reservoir
• Aquaculture pond
• Water source
• Industrial water environment

2. Which parameters are required?

Select only the parameters needed for the project.

3. How often should measurements be collected?

The standard interval is 30 minutes and can be configured down to 6 minutes.

4. Which communication network is available?

Confirm whether the site will use:

• 4G
• NB-IoT

5. What is the water depth?

Water depth and water-level variation are important when determining the anchoring arrangement.

6. Is platform integration required?

Confirm whether data will be viewed through the JW-IoT platform or integrated into the customer’s monitoring architecture.

Providing this information helps determine a more suitable system configuration before quotation and deployment.

12. Water Quality Monitoring System Architecture

A complete online water monitoring project may contain more than the buoy itself.

Depending on the application, the system can combine:

• Water quality sensors
• Floating monitoring buoy
• Solar power system
• Data acquisition controller
• Wireless communication
• Remote monitoring platform
• Historical database
• Alarm management

JW-IoT also provides individual water quality sensors for projects that require sensor integration without a complete buoy platform.

For broader projects involving multiple environmental monitoring points, the buoy can be incorporated into a Smart Water & Environmental Monitoring architecture.

13. Build a Water Quality Monitoring System for Your Project

The JW-MF-520(K40) Solar Powered Water Quality Monitoring Buoy provides an integrated approach for projects that need continuous monitoring directly on rivers, lakes, reservoirs, aquaculture areas or other water bodies.

By combining configurable water quality sensors, solar power, wireless communication and remote monitoring, the buoy can serve as an independent monitoring point or as part of a wider environmental IoT network.

For projects requiring a complete solution, JW-IoT can help determine the sensor combination, communication method and monitoring architecture according to the actual application.

Contact JW-IoT with your required parameters, monitoring location, number of points and communication requirements to discuss a suitable water quality monitoring configuration.

3. Application Scenarios

• River and lake environmental monitoring
• Water source quality monitoring
• Reservoirs and urban water management
• Aquaculture and industrial water monitoring
• Online environmental surveillance for real-time decision making