From July 2023 to July 2024, Hangzhou Shallow Sea Technology Co., LTD. (hereinafter referred to as: Shallowsea Technology participated in the seawater quality automatic monitoring system test organized by the National Marine Environment Monitoring Center of the Ministry of Ecology and Environment. After long-term laboratory testing and on-site verification, Shallowsea Technology successfully passed the test. It shows that the multi-parameter water quality analyzer, in situ nutrient analyzer and water quality automatic monitoring buoy system developed by our company have high reliability and stability. The test includes water temperature, salinity, turbidity, pH, dissolved oxygen, nitrite nitrogen, nitrate nitrogen, ammonia nitrogen, phosphate and other 9 parameters, a total of 101 test indicators, the relevant test report has been published recently.

• Instrument performance test

Test content: detection limit, precision, accuracy, zero drift, span drift, linearity, label recovery. Test dates: July 2023, January 2024, July 2024. Test location: National Marine Environmental Monitoring Center.

• Field test
  

Test contents: data acquisition rate, data efficiency, field comparison, period verification, approved solution verification, approved solution drift, blank drift. Testing time: August ~ September 2023, May ~ June 2024. Test location: Dalian and Xiamen waters.

• Test basis

Technical Specification for Automatic Monitoring of Water Quality in Coastal Waters (HJ 731-2014), Test Scheme of Automatic Monitoring System for Seawater Quality (National Marine Environmental Monitoring Center, April 2023)

• Test result
  

A total of 101 tests were conducted, and 101 technical requirements were met.‌

• The three products involved in this test are introduced

The multi-parameter water quality analyzer can be freely combined with a variety of water quality sensors, monitoring factors include: temperature, pH, conductivity, salinity, dissolved oxygen, turbidity, chlorophyll A, blue-green algae, phycoglobin, depth, etc. RS485 interface and standard Modbus protocol, low power consumption, with lithium battery and internal storage, suitable for long-term underwater work, measurement stability, strong anti-interference ability. It is mainly used for online monitoring and portable monitoring of surface water, drinking water, municipal sewage, industrial wastewater, groundwater, ocean and other different water bodies, and can also be used for monitoring buoys, monitoring floating drainage, monitoring ships and other integrated applications.

02 In situ nutrient analyzer

The In situ Nutrient Analyzer (APNA) is an automatic chemical analysis instrument for measuring nutrient concentrations in seawater. It can detect the five parameters of conventional seawater nutrients, namely nitrate, nitrite, phosphate, silicate, ammonium salt, etc. The depth of the instrument is deep, up to 200 meters underwater. The layout mode is diverse, can be profile measurement, can also be cruise measurement, can meet the application site for profile measurement and cruise measurement needs. It is mainly used in Marine scientific research, Marine environment monitoring, Marine pasture, river estuary, offshore and other fields.

03 Water quality automatic monitoring buoy system

The water quality automatic monitoring buoy system is a highly integrated monitoring system which is used to monitor the hydrology and meteorological changes of Marine environment and can provide real-time and continuous monitoring data of Marine environment. Observation items include: wind speed, wind direction, temperature, humidity, pressure and other meteorological elements, water quality parameters, nutrients, oil in water, waves, ocean currents, nuclear radiation and other Marine elements. It can be used in water quality monitoring of rivers, lakes, reservoirs and oceans, monitoring and early warning of blooms and red tides, early warning of sudden pollution accidents and ecological environment assessment of water quality.