1、 Instrument Introduction

bodBOD5It is a testing item for water quality evaluation and a key quality indicator for measuring the pollution of organic matter on water quality. traditionBOD5The measurement method adopts the chemical dilution method, which is cumbersome to operate and requires high experimental skills from analysts. The experimental data has a large degree of dispersion, often resulting in inaccurate experimental results.

DS-805Type direct reading typeBOD5The measuring instrument is a new type of instrument that uses the air pressure difference method to determine 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 used in environmental monitoring, petrochemical, medical and health, education and scientific research departments to monitor water quality, and is a powerful tool for analysts.

Inject the water sample or pre treated water sample into the culture bottle, and place the carbon dioxide absorbent in the absorption cup at the bottle mouth(NaOH)Then seal the culture bottle and place it in the biochemical incubator. When the tested sample is in20±1After five days of constant temperature cultivation at ℃, the water sample in the bottle undergoes biological oxidation reaction at a certain stirring speed. 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 water sample's oxygen demand during the specified measurement period can be calculatedBODValue.

2、 Technical indicators:

1Environmental temperature:0℃～40℃

2Measurement method: Differential pressure method

3Measurement range:0mg/L～1000mg/L(BOD5Dilution is required when the value exceeds the measurement range)

4Batch processing volume: Each time8A water sample

5accurate true Degree: Compliant with national standards“GB7488-87”Standard regulations (glucose glutamic acid standard solution)BOD5Value in180mg/L～230mg/LWithin the scope)

6, Show Display: The sample can be directly read from the pressure gauge scaleBOD5Value（mg/L）

7Cultivation temperature:20℃±1℃

8Electricity Source: Communication36V

9Host size:400mm×270mm×350mm

10Host weight:5kg

11, Gong Consumption: Instrument18W

3、 Preparation checklist:

BODhost1Table, cultivation bottle10One, mixer10OneCO₂Absorption cup8Individual, mercury1Bottle and rubber drive belts (large and small)3Article), sealing ring2Support and insurance management2Only one AC/DC converter for power supply.