The sewage COD detector adopts analytical technology and precise sensors, which can provide accurate detection results in a short period of time for both clear streams and heavily polluted industrial wastewater, providing reliable data support for environmental protection departments and enterprises, helping to scientifically evaluate the degree of water pollution and formulate reasonable treatment plans. There are multiple types to meet the needs of different scenarios. For example, online automatic monitoring devices can achieve 24-hour continuous automatic sampling and analysis; Portable rapid detection devices are suitable for on-site emergency testing, greatly improving detection efficiency.

The sewage COD detector can work stably under various complex water quality conditions, with strong anti-interference ability, ensuring the stability and reliability of the detection results. Some detection devices such as electrochemical and ultraviolet absorption methods can achieve real-time online monitoring, timely grasp the changes in water quality, facilitate the timely detection of problems and take measures. Many instruments have functions such as automatic calibration and cleaning, reducing human operation errors and improving the accuracy and repeatability of detection.

Precautions for using sewage COD detector:

1. Reagent management

-Choose reagents with reliable quality and high purity (such as potassium dichromate, silver sulfate), and avoid using expired or spoiled products. Store in a dry and cool place, away from direct sunlight and humid environments; Prefabricated reagent tubes need to be checked for packaging integrity to prevent leakage or deterioration.

2. Temperature control

-Strictly follow the reaction temperature set in the instrument manual (such as 165 ℃) and maintain a constant temperature. The laboratory should be equipped with air conditioning and other facilities to maintain a stable environment and avoid temperature fluctuations affecting measurement results.

3. Safety protection

-When handling strong acids or toxic substances, it is necessary to wear protective gloves, goggles, and other equipment, and perform reagent addition and digestion operations in a fume hood to prevent sulfuric acid splashing or inhalation of harmful gases. Waste liquid needs to be properly disposed of in accordance with environmental regulations.

4. Range selection and dilution treatment

-Select the appropriate measuring instrument range based on the estimated range of COD concentration in the water sample. If the concentration exceeds the upper limit, the sample should be diluted before testing to avoid damaging the instrument's optical system or causing data overflow. For example, low range instruments (0-200mg/L) are not suitable for high concentration chemical wastewater (COD may reach thousands of mg/L).

5. Daily maintenance and upkeep

-Regularly clean the surface of the instrument, check the pipeline connections, replace the filter element, etc; The peristaltic pump tube needs to be replaced every 3 months due to contact with corrosive reagents; The measuring room and reaction room should be inspected and cleaned at least once a year. Pay attention to software updates and hardware maintenance information released by manufacturers, and upgrade and optimize performance in a timely manner.

6. Data Management and Analysis

-Detailed recording of measurement data and related conditions (such as reagent batch number, digestion parameters) for each sample, facilitating traceability and anomaly analysis. For results that deviate from expectations, it is necessary to review the operating procedures or recalibrate the instrument.

7. Environmental control

-Keep the laboratory clean and tidy, reduce the impact of dust and debris on the instruments. Simultaneously monitor temperature and humidity changes to ensure stable experimental conditions.