DS-805 direct reading BOD5 meter

Type direct-reading D meter
Product Description
Biochemical oxygen demand D is a must-measure item for water quality evaluation and an important quality indicator for measuring the pollution of water quality by organic matter. The traditional determination method of D adopts chemical dilution method. This method is cumbersome to operate and requires high experimental skills of analysts. The large discreteness of experimental data often results in the inability to obtain accurate experimental results.
The direct-reading D meter is a new type of instrument that uses the air pressure difference method to measure biochemical oxygen demand. It is simple to operate and can provide accurate measurement results comparable to the chemical dilution method. It is intuitive to use and easy to maintain. It is widely used in environmental monitoring, petrochemical industry, medical and health, teaching and research and other departments to monitor water quality. It is a powerful tool for the majority of analysts.
Inject the water sample or pre-treated water sample into the culture bottle and put a carbon dioxide absorber () into the absorption cup at the mouth of the bottle. Then seal the culture bottle and place it in a biochemical incubator. When the sample to be tested is After five days of cultivation at a constant temperature of ℃, the water sample in the bottle undergoes a biological oxidation reaction at a certain stirring speed. Organic matter is converted into nitrogen, carbon and sulfur oxides and produces carbon dioxide gas, which is absorbed by sodium hydroxide. The oxygen in the upper space of the culture bottle continuously supplies the oxygen demand of the microorganisms in the water sample. A pressure difference is generated in the culture bottle and passes through the detection glass tube. The height of mercury in the water sample can be used to calculate the D value of the water sample within the specified measurement period.
Technical indicators:
, Ambient temperature: ℃ ~ ℃
, Measuring method: Differential pressure method
, Measuring range: /~/ (dilution is required when the D value exceeds the measuring range)
, Batch processing capacity: each water sample
, Accuracy: in line with national standards - standard regulations: the D value of glucose glutamate standard solution is within the range of /~/)
, Display: The sample D value (/) can be read directly from the pressure gauge scale
, culture temperature: ℃℃
, power supply: AC
, host size:
, host weight:
, power consumption: instrument