Characteristics and application of KHCOD-12K national standard COD digestion reflux device

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KHCOD-12KNational standard method COD digestion reflux deviceUsing advanced microcomputer technology, 12 300ML cylindrical bottles can be heated and refluxed for digestion simultaneously. Fully comply with the HJ828-2017 national new standard method (original)GB11914-89)Ensure boiling for 2 hours. And high-quality heating wires are selected, with reasonable heating power. The contact surface is changed to a microcrystalline surface, and the tabletop is flat and easy to clean.

KHCOD-12KNational standard method COD digestion reflux deviceUsing a specially designed heating plate with microcrystalline surface, the heating is uniform and the heating and cooling speed is fast. At the same time, accidentally dripping the sample solution makes cleaning more convenient.

KHCOD-12KThe national standard COD digestion reflux device can set the digestion time, display the digestion time countdown, and automatically stop heating after digestion. The instrument fan continues to work to assist in sample cooling and can be left unattended.

KHCOD-12KType national standard COD digestion reflux device,Using glass burr reflux tubes instead of spherical reflux tubes, and replacing circulating water cooling methods with air and water cooling technologies, the operation is more convenient. The cooling part is mainly completed by burr condensation tube water cooling and fan air cooling. The upper part of the condensation tube is a spherical bubble with good cooling effect. The catalyst is added here to prevent the instantaneous volatilization of light components in the sample, and can be covered with a volatilization cap. The following section is"burr"Shape refers to multiple opposing surfaces extending from the wall of a condenser tube on a plane"Cold Bubble"Compared to a simple spherical condenser tube, it increases the cooling area and can block the passage of volatile substances and vapors. In addition, the cooling water in the upper part of the spherical reflux tube and the fan inside the machine have a dual effect,KHC0D-12typeStandard CODDigestion device,Ensure the reflux cooling of the sample,Insert type burr reflux tube, safe and stable to use.

Technical specifications:

LCD temperature control display, displaying the actual temperature change of the heating surface, showing the countdown of the digestion time, and has over temperature protection function and peak sound prompt function. Dual fan air cooling, microcrystalline board heating.

Measurement range:5～700mg/L；700mg/L～10000 mg/LDetermination after dilution of water sample

Dissolving time:1Minutes~9hour59Minutes (Users can choose their own heating time, normally set to2hour30Score)

Measurement error: Potassium hydrogen phthalate standard solution（500mg/L）The relative standard deviation is not greater than5%；

Industrial organic wastewater（500mg/L）The relative standard deviation is not greater than8%

Temperature range: Room temperature~500℃； Constant temperature accuracy:±1℃； Temperature fluctuation: ＜±5℃

Environmental temperature: ≤40℃

Cooling method: advanced dual fan air cooling, condenser tube water cooling

Number of Dissolved Samples:12individual300mlThe cylindrical bottle and microcrystalline plate are heated and digested in two rows, making sampling very easy to clean.

Heating power: ≤1800W（AC 220V，50HZ）

Instrument size:490*290*605mm（H）

KHCOD-8ZType national standard COD digestion reflux device (8 250ML conical flasks)

Standard COD digester/COD constant temperature heater/COD standard digestion method

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