JQ-102 standard COD digester (8 tubes)

JQ-102 standard COD digester (8 tubes)Execution standards：

The microcrystalline standard COD digester follows the basic principles of ISO and HJ828-2017 standards, ensuring a 2-hour digestion operation with reflux heating and micro boiling. The preparation and addition of reagent solutions are consistent with the national standard method, ensuring reliability and correctnessThe analysis results. The HCA-102 standard COD digester adopts microcomputer technology for timed control of the heating electric furnace, which can simultaneously heat 8 250ML conical digestion reflux devices. Eight digestion cone reflux devices can be heated simultaneously to achieve energy-saving, reduce power load, and improve efficiency.

working principle:

The use of glass burr reflux pipes instead of spherical reflux pipes, and the use of air cooling technology instead of tap water reflux cooling, with static water assisting cooling at the end of the condenser pipe, can not only save water and standardize the instrument, but also improve the safety of instrument use.Standard COD digesterSuitable for the determination of COD in surface water, domestic sewage, and industrial wastewater. Not applicable for the determination of COD in water with chloride concentration greater than 1000mg/L (diluted).When the sampling volume is 10.0mL, the detection limit is 4mg/L and the lower limit of determination is 16mg/L. The upper limit for undiluted water samples is set at 700mg/L. If it exceeds this limit, it must be diluted and measured.

Technical indicators and performance characteristics:

The wavy strip heating wire of the flat electric furnace plate is made of a new type of rare earth alloy material, which has an extremely long service life. The surface of the electric furnace plate is covered with a glass panel that can withstand high temperatures up to 800 ℃. When heated, the surface of the electric furnace heats up evenly, and the heating and cooling rates are fast. The electric furnace plate uses a new type of high-temperature resistant inorganic environmentally friendly insulation material, which has low heat loss in the bottom plate and surrounding areas, uniform heating and thermal conductivity, and higher thermal efficiency.Flat electric furnace plate with heat-resistant glass panel that is flat, smooth, and easy to clean; If the surface is contaminated, simply wipe it dry with a cloth to reduce damage to the instrument caused by improper operation.The improved glass burr reflux tube and heat dissipation system ensure the parallelism and accuracy of the sample digestion results due to its excellent digestion reflux effect.Corresponding to different heating powers selected by the user, the surface heating temperature of the electric furnace can be displayed.The digestion time can be set. After digestion is completed, the instrument automatically stops heating, and the instrument fan continues to work for one hour to assist in sample cooling. It can be left unattended.Energy and water conservation, safety and reliability have improved the work efficiency of operators.

Technical indicators:

Measurement range: 10-700mg/L, diluted water samples greater than 700mg/L are measured.

Dissolving time: 5 minutes to 2 hours and 30 minutes (users can choose their own heating time)

Measurement error: standard solution (500mg/L), relative standard deviation not greater than 5.0%, industrial organic wastewater (500mg/L), relative standard deviation not greater than 8.0%

Environmental temperature: ≤ 40℃

Dissolve 8 samples (using a 250mL conical flask with a 24 # grinding mouth)

Heating power: ≤ 1600W (AC 220V, 50HZ, users can choose their own heating power)

HCA-102 typeMicrocrystalline standard COD digester is applied to various environmental monitoring stations such as environmental protection departments, universities, sewage treatment plants, chemical plants, etc