Online CODcr Analyzer

Online CODcr analyzers continuously measure chemical oxygen demand using the dichromate (Cr) oxidation method in an automated flow-through system — delivering real-time wastewater quality data for industrial discharge compliance, treatment process optimization, and environmental monitoring without manual laboratory sample preparation and analysis cycles.

The CODcr measurement replicates the standard ISO 6060 and GB 11914 dichromate digestion method. A metered sample volume mixes with potassium dichromate reagent and sulfuric acid in a heated digestion reactor at 150°C. The dichromate oxidizes organic and inorganic compounds in the sample during a timed digestion period. The residual dichromate concentration after digestion is then measured photometrically at 600nm or 440nm wavelength. The analyzer calculates CODcr from the difference between initial and residual dichromate concentration. Furthermore, this method covers measurement ranges from 5 mg/L to 15,000 mg/L COD — addressing both low-strength municipal wastewater and high-strength industrial effluent from textile, pharmaceutical, and food processing operations.

Automated reagent dosing, digestion, measurement, and cell cleaning cycles run without operator intervention between calibration events. Calibration intervals on professional systems extend to 30 days using stable standard solutions stored in sealed reagent packs. Additionally, automatic zero and span checks run on programmable schedules — maintaining measurement traceability between manual calibration visits. Chloride interference compensation algorithms correct CODcr readings for high-chloride industrial wastewater matrices where chloride oxidation by dichromate would otherwise inflate results above true organic load values.

Output interfaces include 4–20mA analog, RS-485 Modbus RTU, and Ethernet for integration with SCADA platforms, PLC-controlled treatment dosing systems, and environmental data management software. Alarm relay outputs flag readings exceeding discharge permit limits in real time — triggering operator alerts and automated treatment response without waiting for manual sample analysis results.

These analyzers serve Pakistan’s textile effluent treatment plants in Faisalabad and Lahore, pharmaceutical manufacturing discharge compliance monitoring in Karachi, tannery wastewater treatment operations in Sialkot, sugar mill effluent management programs, and Pakistan Environmental Protection Agency industrial discharge enforcement programs requiring continuous, automated CODcr measurement for regulatory compliance.

Tactical Supply Pakistan supplies online CODcr analyzers for industrial effluent compliance monitoring, wastewater treatment process control, and environmental discharge management procurement across Pakistan.