Technical parameters of portable water quality meter (COD, ammonia nitrogen)

**TD-820A Portable Water Quality Tester (COD, Ammonia Nitrogen) – Technical Specifications** The TD-820A is a portable water quality analyzer designed for on-site measurement of Chemical Oxygen Demand (COD) and Ammonia Nitrogen. It offers high accuracy and ease of use, making it ideal for environmental monitoring, wastewater treatment, and field testing. **1. Measuring Range (with Dilution Capability):** - **COD:** 5 to 2000 mg/L - **Ammonia Nitrogen:** 0.02 to 25 mg/L **2. Measurement Accuracy:** - **COD:** ±5% or less - **Ammonia Nitrogen:** ±3% or 0.2 mg/L (whichever is greater) **3. Repeatability:** - ≤3% under the same conditions **4. Optical Stability:** - The absorbance value drifts by less than 0.002A within 20 minutes **5. Anti-Chlorine Interference:** - Capable of handling up to 2000 mg/L chlorine during COD analysis **6. Weight:** - 500 grams (lightweight and easy to carry) This instrument is equipped with a user-friendly interface, reliable performance, and robust design, ensuring accurate and consistent results in various field conditions. Perfect for professionals who require quick and precise water quality assessments.

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