System & Equipment Online Water Analyzer Suppliers

Product Overview

- QILEE Online Water Analyzer is an automatic continuous COD monitor designed for online measurement of Chemical Oxygen Demand using the national potassium dichromate method (GB11914-89).

- It is a compact, cabinet-mounted analyzer (800×430×300 mm) with touchscreen control, data retention on fault/power loss, and automatic recovery procedures after reset or power restoration.

- Outputs and integration: 4–20 mA (two channels), RS232/RS485, and two relay control outputs for process control or SCADA connection.

Product Features

- Measurement principle: sealed high‑temperature (≈165°C), high‑pressure digestion with potassium dichromate; mercuric sulfate and silver sulfate remove chloride interference and catalyze oxidation; colorimetric detection converts color change to COD value.

- Key assemblies: selector valve for flexible reagent/sample routing; peristaltic sampling pump with air buffer to prevent tube corrosion; photoelectric metering for precise low-volume dosing (1.5 ml increments); sealed digestion chamber to avoid corrosive gas effects.

- Materials and reliability: imported PTFE transparent reagent tubing (≥1.5 mm ID) to reduce blockages; adjustable digestion, sampling and calibration cycles; alarm and fault-tolerant design.

Product Value

- Continuous, automated COD monitoring enables real‑time process control, faster response to effluent changes, and improved regulatory compliance.

- Precise low-volume dosing and sealed digestion lower reagent consumption and reduce equipment corrosion and maintenance costs.

- Flexible outputs and adjustable sampling/calibration make the analyzer easy to integrate into plant control systems and operating routines, improving operational efficiency and decision-making.

Product Advantages

- High accuracy and repeatability within stated ranges (accuracy: ≤±10% for ≥100 mg/L; ≤±8 mg/L for

- Reduced consumables and operating cost via small precise doses, reliable peristaltic sampling design, and anti-blocking PTFE tubing.

- Robust design for long service life: sealed digestion to prevent corrosion, automatic flushing after faults, data protection on power loss, and easy monthly maintenance (~30 minutes).

- Rapid deployment and support from an experienced supplier (20 years’ design experience, global presence, modular/containerized system expertise).

Application Scenarios

- Continuous monitoring of industrial wastewater effluent and in-process streams (chemical, pharmaceutical, food & beverage, textile, petrochemical).

- Municipal wastewater treatment plants for compliance monitoring and process optimization.

- Water reuse and recycling systems, factory upgrades and centralized monitoring in industrial parks.

- Integration into modular, containerized, or plug‑and‑play treatment units where fast deployment and reliable online COD measurement are required.