Wastewater treatment plants face increasing pressure to comply with stringent discharge standards while optimizing operational efficiency. Our intelligent water quality monitoring solutions deliver reliable, real-time data across the entire treatment process — from influent to effluent — enabling plant operators to respond instantly to water quality variations, reduce energy consumption, and maintain full regulatory compliance even under the toughest conditions.
●Fluctuating influent disrupting stable operations?
●Tightening discharge compliance thresholds?
●Energy-cost squeeze with rising efficiency demands?
Influent monitoring — Assessing raw wastewater characteristics, providing baseline data for process control
Biological tank monitoring — Tracking DO, NH₄⁺-N, NO₃⁻-N, pH to optimize aeration and nitrification/denitrification processes
Secondary sedimentation — Monitoring sludge blanket level and effluent quality
Effluent monitoring — Ensuring compliance with discharge permits and receiving water quality standards
Linksens provides a comprehensive, end-to-end water quality monitoring solution tailored specifically for wastewater treatment plants. Our intelligent sensor network spans the entire treatment train — from raw influent to final discharge — delivering continuous, real-time data that empowers plant operators to optimize processes, reduce operational costs, and maintain regulatory compliance.
| Monitoring points | Purpose |
| Influent inlet | Real-time monitoring & anomaly alerting |
| Anaerobic Reactor | Process parameter optimization via dynamic tuning |
| Aeration Basin | Automated chemical dosing adjustment (analytics-driven) |
| Final Effluent Launder | Predictive discharge compliance risk forecasting with preemptive alerts |
Parameters：COD, Ammonia Nitrogen (NH₄⁺-N), pH, Temperature, Flow Rate
Recommended Products：
S-MT191 Multi-Parameter Water Quality Sensor
K-COD004 Online COD Analyzer
Why It Matters：
Raw influent characterization is the foundation of effective process control. Knowing incoming pollutant loads allows operators to anticipate aeration demands, chemical dosing requirements, and sludge production. Linksens S-MT191 multi-parameter sensor simultaneously monitors up to 9 parameters including COD, NH₄⁺-N, pH, and temperature via a single IP68-rated probe with RS-485 Modbus RTU output. The K-COD004 digital COD analyzer provides rapid, laboratory-grade COD measurements for more detailed analysis when needed
Parameters ： Dissolved Oxygen (DO), Ammonia Nitrogen (NH₄⁺-N), Nitrate Nitrogen (NO₃⁻-N), pH, ORP
Recommended Products ：
S-DO011 DO Sensor (membrane-free, maintenance-free optical technology)
NH₄⁺/NO₃⁻/TN 4-in-1 Digital Sensor
Why It Matters ： The biological tank is the heart of the wastewater treatment process. This is where microorganisms break down organic matter and remove nitrogen through nitrification and denitrification — two processes that demand precise control. DO directly determines the efficiency of aerobic degradation: too little DO starves the microbes; too much wastes energy (aeration can account for 50-70% of a plant's total electricity consumption). NH₄⁺-N monitoring enables ammonium-based aeration control, a proven energy-saving strategy, while NO₃⁻-N ensures denitrification is proceeding properly for total nitrogen removal. Linksens' optical DO sensor uses advanced fluorescence technology, requires no membranes or calibration solutions, and delivers stable, drift-free measurements even in sludge-laden environments. The four-in-one NH₄⁺/pH/NO₃⁻/TN digital sensor features built-in isolation for noise rejection in electrically noisy environments
Parameters ： Sludge Blanket Level, Turbidity, Suspended Solids (SS/TSS)
Recommended Products ：
S-MT191 Multi-Parameter Probe (turbidity & TSS measurement capability)
Dedicated sludge blanket sensor (custom configuration)
Why It Matters ： The secondary clarifier separates biological solids from treated water. Monitoring sludge blanket level prevents solids carryover into the effluent while optimizing sludge wasting schedules. Turbidity and TSS provide real-time feedback on solid-liquid separation efficiency, allowing operators to detect upset conditions early — from rising sludge (caused by denitrification in the clarifier) to bulking sludge (caused by filamentous bacteria overgrowth). By integrating these measurements, plants can maintain effluent clarity and protect downstream filtration or disinfection processes.
Parameters ： COD, NH₄⁺-N, TN, TP, Turbidity, pH, Residual Chlorine
Recommended Products：
S-MT191 Multi-Parameter Water Quality Sensor
K-COD004 Online COD Fast Analyzer
Dedicated TN/TP sensors (custom configuration)
Linksens sensors deliver the continuous, real-time data needed to demonstrate discharge permit compliance and enable rapid corrective action when water quality deviates from permitted limits — a critical requirement under the new GB 18918-2002 Amendment.
Full-coverage solution, one-stop shop — From influent to effluent, we provide sensors, controllers, and data integration—everything needed to build a complete plant monitoring network
Built for the harshest environments — IP68-rated, corrosion-resistant housings and anti-fouling sensor designs engineered for reliable life in sludge, chemicals, and humidity
Low maintenance, high up-time — Reagent-free optical and ISE technologies eliminate frequent calibration and consumable replacement
Seamless integration — Standard Modbus RTU/RS-485 protocols ensure easy connection to existing SCADA, PLC, or cloud-based monitoring systems
Global support — Serving governments, industries, and innovators worldwide, with responsive technical support and application expertise
How often do Linksens sensors require calibration and maintenance?
Linksens optical DO sensors and ISE-based ammonia/nitrate sensors are reagent‑free and membrane‑free. Under normal wastewater conditions, calibration is recommended every 6–12 months. Routine maintenance (sensor cleaning) typically takes less than 10 minutes per month, greatly reducing operator workload compared to traditional electrochemical sensors.
