1.meet the standard

National Environmental Protection Standards of the People's Republic of ChinaHJ 505-2009Five day biochemical oxygen demand for water quality（BOD5）Determination of dilution and inoculation methods.

2.Application field

Suitable for five-day biochemical oxygen demand in surface water, industrial wastewater, and domestic sewage（BOD5）The measurement.

3.working principle

Based on the principle of pressure difference measurement, the instrument is designed to simulate the natural degradation process of organic matter: oxygen in the air above the test bottle continuously supplements the dissolved oxygen consumed in the water, which is generated during the degradation process of organic matterCO2Absorbed by sodium hydroxide in the sealed lid, the pressure sensor constantly monitors the pressure changes in the sample bottle. biochemical oxygen demandBODEstablish a correlation between the amount of oxygen consumed in the test bottle and the gas pressure, and process this correlation through instruments to obtain the biochemical oxygen demandBODThe value.

4.Specification

Measurement accuracy: ±10%.

Measurement repeatability: ≤5%.

● Measurement range:0～35、0～70、0～350、0～700mg/L(Directly measurable)；700～4000 mg/L(Measurement after dilution is required).

Measurement cycle:5、7、10Oh my god.

● Sample quantity:6Group.

● Cultivation bottle capacity:500mL.

Resolution:0.1mg/L(0～35、0～70mg/L)

1mg/L(0～350、0～700mg/L)

● Display method:LCDDisplay.

● Cultivation temperature:20±1℃.

● Power configuration:AC（100～240）V （50～60）50～60Hz.

● Overall dimensions of the host:320mm(Long) ×300mm(Width) ×120mm(High)

● Host weight:5kg

● Shell material: Overall engineering plastic structure（PC+ABS）Anti electromagnetic radiation treatment, impact resistance, anti-corrosion

5Product functional features

● Can displayBODTrend curve of change.

● Can be achieved throughRS232Interface and computer connection.

Mercury free differential pressure sensing method ensures accuracy and safetyBODMeasurement.

Real time clock display.

● Automatic collection and data storage function.

● Direct displayBODConcentration value.

● Can connect to a computer to print process curves.

System parameters and experimental data will not be lost when powered off.

●LCDHumanized interface display, simple operation.

● Experimental time can be selected5、7、10Oh my god.

Store measurement data and update results at any time during testingLCDObservation on the display screenBODChange rate, can be stored during measurement480A data point.