COD Heating Digester

Hangzhou Qiwei Instrument Co., Ltd. is one of the leading manufacturers and suppliers of cod heating digester in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk cod heating digester in stock here from our factory. We also accept customized orders.

 

 

 

Digital heating digesters called COD-25 and QW-COD-9 are made to prepare water samples in batches for chemical oxygen demand (COD) examination. These devices use a sealed micro-reflux digestion technology that allows for controlled heating and changeable digesting time without the need for extra condensation water.

To support various laboratory demands, two variants are offered. While the QW-COD-9 can digest up to nine samples in a batch, the COD-25 can digest up to 25 samples at once. Both devices have a programmable digesting time of 0 to 720 minutes and an adjustable temperature range of 45°C to 190°C.

The COD-25 and QW-COD-9 are appropriate for environmental laboratories, wastewater testing facilities, industrial quality control departments, and research institutions needing repeatable batch sample preparation because of their compact design, over-temperature alarm protection, and heat- and pressure-tested digestion tubes.

QiweiLab can assist you in choosing the best digestion configuration whether you are setting up a new water testing lab or increasing the capacity of an existing COD sample preparation facility.

 

product key technologies

01.

Model COD-25 and COD-9 digesters are special laboratory instrument for sample digestion with QW-COD-T/B chemical oxygen demand analyzer. It is mainly used for sample digestion reaction in chemical oxygen demand (COD) analysis, and is also suitable for other uses.

02.

1. The structure is compact, and the digestion reaction of 25(or 9) samples can be carried out at the same time, which greatly reduces the energy consumption.

2. The digestion method of sealed micro-reflux is adopted, and there is no need for condensation of condensation water.

3. The digestion temperature can be set arbitrarily from 45 to 190 ℃, and there is an over-temperature alarm device, which is convenient to use.

4. The digestion time 0-720 minutes can be set arbitrarily, and it will be automatically closed after the reaction is over, so the operation is simple.

5. Each tube has passed the pressure and heat resistance test, which is safe and reliable.

COD digestion procedures may involve acidic reagents and elevated reaction temperatures. Appropriate laboratory ventilation and chemical handling practices are therefore important when configuring a COD digestion workstation.

Before installation, laboratories should evaluate the available bench space, electrical supply, ventilation conditions, and operating environment. If the equipment is placed inside or near a fume hood, sufficient working space and suitable ventilation should be maintained in accordance with the laboratory's safety procedures.

Operators should adhere to the handling guidelines provided by the reagent manufacturer and use the proper personal protective equipment. Hot components should only be handled after sufficient cooling, and digestion tubes and sealing components should be inspected prior to every operation.

Please get in touch with QiweiLab to find out if a suitable configuration or customized solution is available for laboratories with particular needs for exhaust recovery, corrosion-resistant housing, or acid mist collection.

A complete COD testing workflow requires suitable sample digestion equipment and a compatible analytical instrument. The COD-25 and QW-COD-9 can be incorporated into a laboratory water testing setup according to the selected digestion method and measurement requirements.

Recommended Laboratory Equipment Configuration

COD Digester: Choose COD-25 or QW-COD-9 according to the number of samples processed per batch.

COD Analyzer: Use a compatible COD measuring instrument to determine the concentration of chemical oxygen demand after sample digestion.

Reagents and Digestion Tubes: Select the appropriate reagents, digestion tubes, and accessories according to the analytical method.

Laboratory Supporting Equipment: Configure suitable sample preparation tools, laboratory glassware, and safety equipment for daily testing.

Equipment Selection for Different Laboratories

Environmental monitoring laboratories may prioritize higher batch capacity for routine water sample testing. Industrial laboratories may select a configuration according to their daily wastewater inspection workload. Laboratory equipment distributors can combine COD digesters with compatible COD analyzers and consumables to provide a more complete procurement solution.

QiweiLab can assist with model selection, compatible instrument recommendations, and accessory configuration. Contact our team with your preferred COD method, sample throughput, and equipment requirements to request a complete laboratory testing quotation.

1. What is the difference between the COD-25 and QW-COD-9 digesters?

While the QW-COD-9 can digest up to nine samples at once, the COD-25 can digest up to twenty-five samples at once. Both models have a digesting timer with a range of 0 to 720 minutes and an adjustable temperature range of 45°C to 190°C. The decision is mostly based on the batch processing needs of the laboratory.

2. What is the temperature range of the COD-25 and QW-COD-9?

Both types have temperature control that may be adjusted between 45°C and 190°C. The temperature field equilibrium is set at ≤2°C, while the published temperature indication error is ±2°C.

3. Does the COD Heating Digester require condensation water?

A sealed micro-reflux digestion technique is used by the COD-25 and QW-COD-9. Additional condensation water is not needed during the digesting process, according to the product specifications.

4. How long can the digestion timer be set?

The digestion time can be adjusted from 0 to 720 minutes. Operators should select the appropriate duration according to the analytical method and sample preparation requirements.

5. Does the COD Digester have an over-temperature alarm?

Yes. Both models are equipped with an over-temperature alarm device to alert operators to abnormal temperature conditions during operation.

6. Can the COD-25 or QW-COD-9 be supplied with an external power adapter?

A portable external power adapter is listed as an optional configuration. Please contact QiweiLab to confirm availability and suitability for your intended operating environment.

7. Can laboratory equipment distributors request OEM/ODM cooperation?

Yes. QiweiLab accepts OEM/ODM cooperation inquiries. Distributors can contact the sales team to discuss private-label requirements, packaging, order quantities, and other customization possibilities subject to technical evaluation.

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