-->Easy to operate, able to provide accurate measurement results comparable to chemical dilution methods
-->Intuitive reading; Easy to use and maintain; Wide application range
-->Laboratory testing in various industries, sewage treatment, universities, and research institutions

【working principle】

Step 1: Inject the water sample or pre treated water sample into the culture bottle, and place a carbon dioxide absorbent (NaOH) in the absorption cup at the bottle mouth

Step 2: Seal the culture bottle and place it in a dedicated biochemical incubator

Step 3: 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

At this point, organic matter is transformed into oxides of nitrogen, carbon, and sulfur, producing 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.

【technical parameter】

1】 Measurement range:0～1000 mg/L

2】 Accuracy:Compliant with the national standard GB7488

3】 Display:Direct reading

4】 Batch processing capacity:8 water samples

5】 Cultivation temperature:20℃±1℃

6】 External dimensions:400×270×350(mm)

7】 Host weight:6 kg

8】 Host power consumption:＜15W