The industrial online total nitrogen automatic monitoring analyzer is a high-precision monitoring equipment independently developed by Shanghai Botuo. It adopts potassium persulfate digestion ultraviolet spectrophotometry, supports dual range automatic switching of 0-20mg/L and 0-100mg/L, and has measurement accuracy; 3% 🔶 11-32 🔶。 Equipped with automatic calibration, data storage, and over limit alarm functions, compatible with Modbus RTU communication and 4-20mA output, suitable for scenarios such as surface water, industrial wastewater, municipal sewage, etc., to achieve real-time control of total nitrogen concentration and environmental compliance monitoring 🔶 11-38 🔶
The total nitrogen water quality online automatic monitoring device is a professional equipment developed by Shanghai Botuo Instrument for monitoring the total nitrogen (TN) concentration in water environment, focusing on real-time monitoring of total nitrogen content in surface water, domestic sewage, and industrial wastewater3Its core advantage lies in the adoption ofPotassium persulfate digestion UV spectrophotometry methodUnder alkaline conditions, high-temperature and high-pressure digestion of water samples is carried out to convert nitrogen-containing substances into nitrate nitrogen. Concentration calculation is achieved through absorbance detection at wavelengths of 220nm and 275nm, ensuring the accuracy of measurements in complex water bodies4The device is compact in size and easy to maintain, suitable for multiple scenarios such as environmental supervision, standard discharge of sewage treatment plants, and industrial process optimization. The data efficiency is ≥ 90%, providing reliable support for water eutrophication prevention and control.
High precision and dual range adaptationAdopting high-precision photoelectric measurement and detection technology, dual range automatic switching covers low concentration surface water to high concentration industrial wastewater scenarios, meeting the vast majority of water quality monitoring needs65The measurement repeatability error is ≤± 3% to ensure stable and reliable data.
Intelligent operation and maintenance designSupports multiple measurement modes such as fixed-point, periodic, and maintenance, adapting to different monitoring frequency requirements7Equipped with automatic calibration and cleaning functions, with low reagent consumption and a minimum maintenance cycle of over 168 hours (7 days), significantly reducing operation and maintenance costs8Built in fault self checking module, which automatically alarms and records logs in case of extraction abnormalities, heating faults, and other issues, facilitating quick troubleshooting17.
Flexible Data Management and CommunicationMaximum storage capacity of 500000 historical data, supporting curve tracing, USB drive export, and real-time printing10Through RS232/RS485 (Modbus RTU protocol) and 4-20mA analog output, it meets the requirements of docking with environmental protection platforms and data reporting912The data tagging function distinguishes between normal, maintenance, calibration, and other states to ensure clear data traceability15.
Strong environmental adaptabilityThe sampling pipeline adopts high-quality hard PVC or PPR pipes, which are corrosion-resistant and interference free13The sealed design of the digestion chamber avoids reagent volatilization pollution, and the water collection system can move with the fluctuation of the water surface to ensure the representativeness of the water sample13Supports wall mounted or countertop installation, suitable for various industrial scenarios2.
Convenience of operation7-inch touchscreen with guided menu, supports switching between Chinese/English, simplifies parameter settings and calibration steps14Equipped with three-level user permission management (operator, administrator, senior administrator), different permissions correspond to different operation scopes, ensuring data security14.
Detection PrincipleAdd potassium persulfate solution to the water sample and dissolve it under alkaline conditions at high temperature and high pressure, converting all nitrogen-containing substances into nitrate nitrogen; After deducting carbon dioxide absorption by adding XI hydrochloric acid, measure the absorbance at wavelengths of 220nm and 275nm, and calculate the total nitrogen concentration according to Lambert Beer's law4.
Measurement process：
Water sample collection: The water sample is extracted by an injection pump, and after pre-treatment (sedimentation, filtration), it is sent to the metering unit;
Dissolution reaction: After adding reagents, dissolve at high temperature to convert nitrogen-containing substances into nitrate nitrogen;
Photoelectric detection: measure absorbance at a specific wavelength after cooling, and convert it to total nitrogen concentration;
Flow path cleaning: After measurement is completed, the pipeline and colorimetric cell are automatically cleaned to avoid cross contamination16.
environmental monitoringMonitoring of total nitrogen concentration in natural water bodies such as surface water, lakes, and rivers to grasp the trend of eutrophication in water quality and provide data support for the prevention and control of algal blooms3.
sewage treatment plantReal time monitoring of total nitrogen concentration in inflow/outflow to ensure that discharge indicators comply with the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002)3.
industrial wastewaterMonitoring of wastewater treatment processes in industries such as chemical, printing and dyeing, and food processing, optimizing denitrification processes, and reducing treatment costs3.
municipal water supplyMonitoring of total nitrogen in source water to prevent water quality deterioration caused by algae growth and ensure drinking water safety3.
routine maintenanceCheck the remaining amount of reagents and the sealing of pipelines every week, and replace the filter element every month; Perform user calibration every 3 months and verify measurement accuracy using standard solutions; Regularly clean the measuring tube and colorimetric cell to avoid contamination from affecting the detection1819.
troubleshootingCommon faults such as "abnormal liquid extraction" can be checked for reagent level and pipeline blockage; Abnormal heating "requires troubleshooting of the heating wire and fan connector. For complex issues, please contact after-sales remote diagnosis20.
Service GuaranteeCore components come with a one-year warranty and lifetime technical support; National service network coverage, engineers come to repair within 48 hours, provide free operation training and reagent preparation guidance21.
