The SEWB-700 series buoy-type multi-parameter water quality monitoring instrument integrates water quality smart electrodes, a solar power system, a wireless communication system, and a buoy monitoring platform. It can monitor water quality parameters such as pH, electrical conductivity, ORP, dissolved oxygen, turbidity, COD (electrode method), ammonia nitrogen (electrode method), temperature, and more. Features include automatic continuous monitoring and early warning, solar power, wireless data transmission, reagent-free, and unmanned operation, making it suitable for outdoor locations such as rivers, lakes, and areas with difficult power supply and installation conditions.
| |
| SEWB-710 | SEWB-720 |
Product Features
1.Buoy-type design, ready to use after being anchored in the water.
2.Strong scalability, can accommodate 1-7 water quality sensors.
3.IP68 protection level design, highly adaptable to environmental conditions.
4.The buoy is made of plastic material, with a solid internal structure. The connectors use 304 stainless steel for excellent corrosion resistance.
5.Optional solar power supply, no external power needed, with data collection on battery status.
6.In cloudy or rainy weather, batteries can be customized for up to 14 days of operation time.
7.Standard RS485 interface, Modbus RTU communication protocol.
8.4G wireless module can be configured, and the network transmission protocol is customizable according to requirements.
Typical Performance Parameters
Parameter | Measurement Range | Resolution | Accuracy |
ORP | -1999mV ~ +1999mV | 0.1/1mV | ±1%FS |
pH | 0 ~ 14pH | 0.001/0.01pH | ±0.05pH |
DO (Dissolved Oxygen) | 0 ~ 20mg/L | 0.001/0.01mg/L | ±1%FS |
Conductivity | 0 ~ 2000/20000/200000µs/cm | 0.1/1µs/cm | ±1%FS |
TDS (Total Dissolved Solids) | 0 ~ 2000mg/L | 0.1/1mg/L | ±1%FS |
Turbidity | 0-100/500/1000/4000NTU | 0.01/0.1NTU | ±1%FS |
Suspended Solids Concentration | 0 ~ 10000/20000/30000mg/L | 0.1/1mg/L | ±1%FS |
COD | 0-500/1000mg/L | 0.01/0.1mg/L | ±5%FS |
Ammonia Nitrogen | 0-1000mg/L | 0.01/0.1mg/L | ±1%FS |
Temperature | 0 ~ 100°C | 0.01/0.1°C | ±0.3°C |
Product Selection
Product Model | SEWB-710 | SEWB-720 | SEWB-730 |
Dimensions | φ426*531 | φ714*578 | φ714*578 Solar Vertical 3m + Horizontal 5m (Customizable) |
Installation Method | Floating | Floating | Floating + Vertical |
Number of Parameters | 1-6 Electrode Parameters | 1-8 Electrode Parameters | 1-8 Electrode Parameters + 1 Level Parameter |
Signal Output | RS485, Wireless (Optional) | Wireless, Other Customizable | Wireless, Other Customizable |
Protection Level | IP68 | IP68 | IP68 |
Power Supply | DC12-24V; Other Customizable | DC12-24V; Solar (Optional) | Solar; Other Customizable |
Battery Life | None | Customizable | Customizable |
Power Consumption | Apporx.3W | Apporx.5W | Apporx.10W |
Size Diagram
 |  |
Multiple International Certifications: CE, IP68, RoHS, salt spray resistance, along with various domestic calibration certificates in China.
Customized Solutions by a Professional Team
More Durable Electrodes and Sensors: Designed for extended use and work seamlessly with our multi-parameter water quality analysis stations for greater convenience.
User-Friendly Interface: Even beginners can easily complete installation, calibration, and operation.
One-Year Warranty Provided (excluding consumables, starting from the date of receipt).
48-Hour Emergency Support: Global technical response network.
Multilingual Engineering Team: Fluent in English and Japanese for seamless collaboration.
 |  |  |  |
 |  |  |  |
About F&V GROUP
F&V GROUP is a global industrial measurement company committed to delivering innovative, energy-efficient solutions for temperature, pressure, flow, and level applications. Established in 2021, the group unites strong international expertise with localized manufacturing and service capabilities.
Our journey began in 2011 with the founding of FVLUOKY in Wales, UK—a brand built on precision engineering and technological excellence. Over the years, FVLUOKY became a trusted name in industrial measurement across international markets.
To better serve the Asia-Pacific region, Fuyi Intelligent Instrument (Shanghai) Co., Ltd. was established in 2019, introducing FVLUOKY’s product lines to China with localized assembly, testing, and innovation. Fuyi products are fully certified (ISO, CE, TS, CPA) and tailored to regional industry needs.
With the formation of F&V GROUP in 2021, our brands were strategically integrated to accelerate global growth. By 2024, F&V had become a leading force in China and began expanding its footprint to international markets—bringing high-performance, sustainable measurement solutions to customers worldwide.
At F&V, we combine global innovation with local insight—driven by a commitment to quality, sustainability, and customer success.
 |
 |
