Multiparameter photometer, with COD and with digital pH (230)
A COD meter is a laboratory/field instrument used to measure the Chemical Oxygen Demand (COD) of water or wastewater samples. COD represents the amount of oxygen required to chemically oxidize organic and inorganic matter present in water. This parameter is widely used in environmental monitoring, wastewater treatment plants, industrial effluent analysis, and water quality testing. The meter works by using the closed reflux method or colorimetric method, where the sample is digested with strong oxidizing agents (commonly potassium dichromate in acidic conditions), and the oxygen demand is then measured through photometric or titration techniques. Modern COD meters are generally digital, portable, and user-friendly, providing quick and reliable results compared to traditional manual methods.
- Accurate Measurement: Provides precise COD values in mg/L (ppm) for water and wastewater analysis.
- Digital Display: Large LCD/LED screen for clear result reading.
- Wide Measurement Range: Suitable for low to high COD levels depending on application (e.g., 0–1500 mg/L or higher).
- Pre-Programmed Methods: Many meters come with standard COD digestion programs (e.g., 2-hour digestion at 150°C).
- User-Friendly Operation: Simple buttons/menus for easy calibration and measurement.
- Portable and Compact Design: Lightweight and suitable for field as well as lab use.
- Data Storage: Built-in memory for storing multiple test results.
- Connectivity: Some advanced models support USB/RS232 for data transfer to PC or printer.
- Low Reagent Consumption: Uses ready-to-use reagent vials for fast and safe digestion.
- Compliance: Conforms to standard testing methods (APHA, ISO, EPA).
- Durability: Sturdy body, often with chemical-resistant materials.
