Direct reading BOD5 analyzer

1、 Instrument Introduction
Biochemical oxygen demand BOD5 is a necessary measurement item for water quality evaluation and an important quality indicator for measuring the impact of organic matter on water pollution. The traditional method for determining BOD5 uses chemical dilution, which is cumbersome to operate and requires high experimental skills from analysts. The experimental data has a high degree of variability, often resulting in inaccurate experimental results.
The DS-805 direct reading BOD5 analyzer is a new type of instrument that uses the air pressure difference method to measure biochemical oxygen demand. It is easy to operate, can provide accurate measurement results comparable to chemical dilution methods, has intuitive readings, and is easy to use and maintain. It is widely used in environmental monitoring, petrochemical industry, medical and health, teaching and research departments for water quality monitoring, and is a powerful tool for analysts.
Inject the water sample or pre treated water sample into a culture bottle, and place a carbon dioxide absorbent (NaOH) in the absorption cup at the bottle mouth. Then seal the culture bottle and place it in a biochemical incubator. After the tested sample is incubated at a constant temperature of 20 ± 1 ℃ for five days, the water sample in the bottle undergoes biological oxidation reaction at a certain stirring speed. Organic matter is converted into oxides of nitrogen, carbon, and sulfur, and produces carbon dioxide gas that is absorbed by sodium hydroxide. The oxygen in the upper space of the culture bottle continuously supplies the oxygen demand of microorganisms in the water sample, creating a pressure difference inside the culture bottle. By detecting the height of mercury in the glass tube, the BOD value of the water sample during the specified measurement period can be calculated.

IIDirect reading BOD5 analyzerTechnical Indicators:
1. Environmental temperature: 0 ℃~40 ℃
2. Measurement method: Differential pressure method
3. Measurement range: 0mg/L to 1000mg/L (dilution is required when BOD5 value exceeds the measurement range)
4. Batch processing capacity: 8 water samples per time
5. Accuracy: Complies with the national standard GB7488-87 (BOD5 value of glucose glutamic acid standard solution is within the range of 180mg/L to 230mg/L)
6. Display: The BOD5 value (mg/L) of the sample can be directly read from the pressure gauge scale
7. Cultivation temperature: 20 ℃± 1 ℃
8. Power supply: AC 36V
9. Host size: 400mm × 270mm × 350mm
10. Host weight: 5kg
11. Power consumption: Instrument 18W

IIIPreparation checklist:
1 BOD host, 10 culture bottles, 10 stirrers CO₂8 absorption cups, 1 bottle of mercury, 3 rubber drive belts (large and small), 2 sealing rings, 2 fuse tubes, and 1 power AC/DC converter.
Font family: 'Times New Roman', 2 sealing rings, 2 fuse tubes, and 1 power AC/DC converter.