This instrument is designed based on the principle of differential pressure measurement, and simulates the natural process of organic matter degradation: 21% of oxygen in the air above the test bottle continuously supplements the dissolved oxygen consumed in the water, and the CO2 generated during the organic matter degradation process is absorbed by the sodium hydroxide in the sealed lid. The pressure sensor constantly monitors the pressure changes in the sample bottle. Establish a correlation between biochemical oxygen demand (BOD) (corresponding to the amount of oxygen consumed in the test bottle) and gas pressure, process this correlation through instruments, and directly display the value of biochemical oxygen demand (BOD) on the instrument screen.

1. It can display the trend curve of BOD changes

2. Equipped with print output function

3. Can be connected to a computer through a USB interface

4. Real time clock display

5. Automatic collection and storage of data

6. Draw the BOD process curve for users to view

7. Can connect to a computer to print process curves

8. System parameters and experimental data will not be lost in case of power failure

9. Humanized display on LCD interface, easier to learn and understand operation

10. The test time is 5, 7, and 10 days, which can be set by pressing the button

11. Store measurement data and update results. At any time during testing, the rate of BOD change can be observed on the LCD display screen

12. The measurement can store 480 data points, and the instrument can store 20 sets of data for each sample.

1. Measurement accuracy: ± 1% (F.S)

2. Sample scope: Liquid samples, including soluble organic matter samples such as discharged sewage, river water, etc

3. Measurement range: 0-35, 0-70, 0-350, 0-700 (mg/L) (no dilution required) 700-4000 mg/L (dilution required)

4. Sample quantity: ≤ 6

5. Capacity per bottle: 500 mL

6. Analysis repeatability: RSD ≤ 5%

7. Resolution: 0.1mg/L (0-35, 0-70mg/L); 1mg/L (0-350, 0-700mg/L)

8. Display method: LCD display

9. Power supply: AC 220V 50Hz