Wholesale UV COD Electrode Suppliers & Factories
High-precision UV254 absorption sensors and reagentless organic load analyzers engineered for real-time industrial effluent monitoring, municipal sewage compliance, and closed-loop process automation worldwide.
Precision Water Quality Electrodes & Transmitters
Manufactured under strict ISO 9001 and CE frameworks, offering plug-and-play RS485 Modbus telemetry, custom optical path lengths, and robust housings for industrial integration.
High Temperature (0-130℃) pH Sensor
Engineered for thermal synthesis, pharmaceutical reactors, and extreme steam sterilization processes.
View Specifications
High-Temp S8 Connector pH Sensor
Standardized industrial PG13.5 thread and S8 plug-and-socket configuration for seamless bioreactor docking.
View Specifications
High Temperature pH Sensor with NTC/Pt100
Built-in high-accuracy temperature probe for dynamic isothermal coefficient compensation up to 130°C.
View Specifications
Fermentation-Grade High-Temp pH Sensor
Gel electrolyte matrix specifically developed to resist sulfide poisoning and protein passivation during fermentation.
View Specifications
pH5806 Steam-Sterilizable Sensor
Recognized Shanghai Brand high-temp electrode engineered for repeated clean-in-place (CIP) and SIP cycles.
View Specifications
DOG-208FA High Temperature DO Sensor
Continuous polarographic dissolved oxygen electrode built to withstand aggressive autoclave and thermal cycles.
View Specifications
IOT-485 Digital Online Sensor
Integrated micro-transmitter with direct RS485 Modbus RTU telemetry for autonomous edge connectivity.
View Specifications
ZDYG-2088 Optical Turbidity/TSS Sensor
Infrared 860nm nephelometric scatter sensor with automated mechanical wiper preventing biofouling in wastewater.
View SpecificationsThe Global Shift toward Reagentless UV254 COD Monitoring
Why procurement teams and EPC contractors are transitioning from dichromate digestion to solid-state UV absorption electrodes.
Zero Hazardous Chemical Waste
Traditional potassium dichromate titrations generate secondary toxic waste containing mercury (Hg) and hexavalent chromium (Cr⁶⁺). UV COD absorption electrodes measure spectral absorbance at 254 nm directly in the water matrix without consuming reagents or creating hazardous effluent.
Sub-Second Response vs. 2-Hour Lag
Wet chemical analyzers require 60 to 120 minutes of thermal digestion, making them unsuitable for closed-loop aeration and coagulant dosing control. UV COD electrodes calculate Chemical Oxygen Demand, TOC, and BOD equivalents in real time (<2 seconds), mitigating accidental discharge penalties.
85% Lower Total Cost of Ownership (TCO)
Eliminating monthly chemical supply chains, reagent replenishment visits, peristaltic pump tube degradation, and heated reactor maintenance drastically slashes operating budgets. Capital investment pays for itself within 6 to 9 months across municipal and industrial treatment facilities.
Engineered UV COD Solutions for Core Industrial Segments
Deploying specialized optical path designs (1 mm to 50 mm) matched to matrix turbidity, chemical complexity, and municipal standards.
Petrochemical & Refining Effluent
Aromatic hydrocarbons and polycyclic organics exhibit extreme molar absorptivity at 254 nm. Employing sapphire optical windows and a short 1 mm or 2 mm optical gap avoids signal saturation while providing uninterrupted feedback to API separators, dissolved air flotation (DAF), and biological polishing units.
Municipal Wastewater Treatment (WWTP)
From influent equalization monitoring to final clarifier outfall validation. Multi-beam compensation (UV254 for organics combined with 365 nm / 860 nm for turbidity interference subtraction) guarantees precision without drift caused by seasonal suspended solids spikes.
Pulp, Paper & Textile Dyeing Discharges
Effluents with variable organic dyes and lignin compounds require wide dynamic ranges. Integrated self-cleaning mechanical wipers with fluoro-rubber edges prevent persistent biofilm formation, mineral scaling, and pigment adherence during continuous immersion.
End-to-End Metrology & Production Capacity
Operating two advanced facilities in Kangqiao and Lingang, Shanghai with independent cleanrooms, darkroom optical benches, and ISO-certified quality assurance.
UV Optical COD Electrode vs. Alternative Technologies
A systematic engineering comparison covering analytical principles, detection limits, maintenance requirements, and protocol compatibility.
| Evaluation Parameter | UV254 Absorption Electrode | Automated Wet-Chemical COD (Dichromate) | Electrochemical / Ozone Oxidation |
|---|---|---|---|
| Measuring Principle | Dual-beam UV (254 nm) & Turbidity Reference (860 nm) | Thermal digestion with K₂Cr₂O₇ / Ag₂SO₄ spectrophotometry | Electrocatalytic oxidation on diamond/metal oxide electrodes |
| Response Time (T90) | < 5 Seconds (Continuous Real-Time) | 45 – 120 Minutes per batch cycle | 5 – 15 Minutes per measurement cycle |
| Consumables & Reagents | Zero reagents, zero chemical supply logistics | Sulfuric acid, silver sulfate, potassium dichromate, mercury | Carrier electrolytes, periodic working electrode renewal |
| Fouling Prevention | Mechanical wiper / Compressed air blowback option | Flow-tube flushing with high-acid solutions | Ultrasonic pulse or periodic acid stripping |
| Calibration Drift | Long-life UV-LED pulse source (>50,000 hrs), drift <1%/month | Drifts with reagent degradation and digestion tube fouling | Electrode surface passivation requires frequent zero/span |
| Telemetry & Protocols | Isolated RS485 Modbus RTU / 4-20mA loop powered | Complex controller enclosure with PLC relay blocks | Proprietary controller with standard analog options |
Metrology Evolution: Deep-UV LED & Edge-AI Spectral Matrix
The convergence of photonics, AI self-calibration, and multi-wavelength spectroscopy in next-generation water analysis.
Solid-State Deep-UV (220–280nm) LEDs
Replacing legacy xenon flash lamps with micro-scale solid-state Deep-UV LEDs reduces power consumption below 1.5W. This enables solar-powered remote hydrological stations and battery-operated pipeline monitoring nodes while extending optical emitter lifetimes beyond 5 years of continuous pulsing.
Edge-AI Full Spectrum Deconvolution
Advanced UV COD electrodes now integrate multi-channel detectors (254nm, 275nm, 365nm, and 860nm). On-probe neural network algorithms dynamically isolate nitrate (NO₃-N) absorption profiles from complex organic rings, eliminating false positives in municipal biological treatment stages.
Self-Diagnosing Predictive Fouling Sensors
Embedded optical transmittance monitors identify path attenuation prior to measurement failure. The electrode autonomously flags maintenance requirements or increases wiper duty cycles, ensuring uncompromised data integrity within mission-critical SCADA loops.
Localized Standards & Global Factory Assurance
Equipping multinational industrial clients and EPC integrators with verified documentation, localized calibrations, and rapid engineering support.
Regulatory Equivalence Protocols
Our UV COD sensor firmware allows dual-point and multi-point matrix calibration to correlate directly with laboratory dichromate methods (ISO 6060, EPA 410.4, DIN 38409). Meets national effluent outfall continuous monitoring standards across Europe, North America, and APAC.
OEM & ODM White-Label Customization
We provide full white-label hardware and firmware solutions for water treatment equipment OEMs, including custom Titanium or 316L stainless steel housings, custom RS485 register mapping, proprietary Modbus commands, and brand-matched packaging.
Pre-Shipment Aging & Field SLA
Every sensor undergoes a rigorous 48-hour continuous thermal and optical stability aging test before shipment. Backed by direct engineering technical response within 12 hours, rapid replacement spare part dispatches, and life-cycle firmware upgrades.
Frequently Asked Questions by Industrial Buyers
Essential guidance on optical path length selection, turbidity compensation, and calibration correlation.
How does a UV COD electrode correlate with standard dichromate lab COD?
Most soluble organic compounds contain aromatic rings or carbon-carbon double bonds that absorb light at 254 nm according to Beer-Lambert's Law. During site commissioning, operators perform a 2-point or linear regression calibration correlating UV absorbance (SAC254) with standard ISO 6060 / EPA 410.4 lab samples, achieving typical R² correlations > 0.95 in steady-state process water.
How do we select the right optical path length (gap)?
Optical gap selection depends entirely on expected COD concentration and matrix turbidity. For clean surface water and reverse osmosis permeate (0–50 mg/L COD), a 10 mm to 50 mm gap provides maximum sensitivity. For municipal secondary effluent (0–300 mg/L), a 5 mm gap is standard. For high-strength industrial influent or chemical wastewater (500–5000+ mg/L), a 1 mm or 2 mm gap prevents signal saturation.
How is turbidity and suspended solid interference compensated?
Our UV electrodes integrate a dual-wavelength optical path. Alongside the 254 nm measurement channel, an 860 nm (or 365 nm) reference LED detects particulate scatter and turbidity. The internal digital signal processor applies real-time turbidity deconvolution algorithms to subtract scatter loss, outputting genuine dissolved and colloidal organic absorption values.
What maintenance is required for long-term immersion?
Routine manual cleaning is largely eliminated by our integrated mechanical wiper system, which sweeps the sapphire optical windows at user-defined intervals (e.g., every 30 or 60 minutes). In aggressive industrial wastewater with scaling potential, an optional air-purge collar or periodic 5-minute soak in 5% dilute citric acid maintains baseline zero-drift stability.
Process Controllers & Multi-Parameter Analyzers
Integrate our UV optical COD electrodes and high-temperature electrochemical sensors with ruggedized industrial transmitters and panel monitoring systems.
DCA130 pH & EC Dual Analyzer
Dual-channel multi-parameter transmitter for simultaneous pH and conductivity control in compact panels.
Explore Product
MPG-6099Plus Multi-Parameter Panel
Comprehensive multi-parameter station combining pH, conductivity, turbidity, chlorine, and organic load.
Explore Product
pHG-2081Pro Industrial Analyzer
Industrial-grade pH/ORP transmitter with dual isolated 4-20mA, Modbus RTU, and high/low relay contacts.
Explore Product
SJG-2083CS Concentration Meter
Inductive toroidal conductivity analyzer designed for chemical concentration and CIP system monitoring.
Explore Product
Online Residual Chlorine Analyzer
Constant-voltage amperometric sensor for continuous municipal drinking water disinfection control.
Explore Product
SWAS Trace Chemistry Analyzer
Ultra-trace colorimetric analyzer monitoring silica, sodium, phosphate, and hydrazine in boiler feedwater.
Explore Product
TOC-3042 Online TOC Analyzer
Continuous UV persulfate / catalytic oxidation total organic carbon analyzer for pharma purified water.
Explore Product
Nutrient & Heavy Metal Analyzer
Wet-chemistry outfall compliance system for automated COD, total phosphorus, total nitrogen, and NH3-N.
Explore Product