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The first thing we need to consider is sample volume which is a key factor to evaluate use volume, processing requirements of the laboratory to select the right number of  vessels to ensure that the equipment can meet the needs of the experiment today and in the future.

What models does Welso have for microwave digestion system?

WMD600/800/1000/1200

This series of microwave digestion system has different numbers of vessel positions to choose. (6, 8, 10 and 12 vessels) with each vessel volume of 100mL. This series is compact and easy to operate with 7 inch touchscreen which can meet sample digestion requirements of most laboratories.

WMD1200R/1800R

Vessel positions of this series is 12 and 18 with vessel volume of 100mL. This series size is bigger

than WMD600 series这款相比WMD600 with 8 inches touch screen. This series is suitable for laboratory with large sample volume requirements, providing stable digestion performance.

WMD4000

This is a high-capacity instrument with batch capacity up to 40 vessels which can digest 40 samples at a run, easily handle with a large number of sample testing. Its digestion vessel volume is 50mL with external 8-inch touch screen for high-throughput laboratories to provide efficient and convenient solutions.

These models and specifications vary depending on the needs of the lab, Right models shall be selected based on the type of sample, sample volume, and application fields. If you are interested in a specific model, you can check product page of the microwave digestion system or contact Welso for the latest information.

In addition to the sample volume selection, we also need to measure the safety performance of each brand of equipment, because microwave digestion is usually performed under high temperature and high pressure conditions, so safety is an important factor to consider when purchasing.

What safety precautions does Welso's microwave digester have?

True dual temperature and pressure measurement and dual control: Welso microwave digestion instrument adopts all vessels non-contact IR scanning temperature measurement system which collects temperature parameters at high frequency, can accurately and real-time monitor the sample temperature, and when the temperature in the vessels exceeds the preset parameters, the microwave output is adjusted to ensure stable temperature control during the working process.

In addition, the non-contact all vessel fiber scanning pressure control system is used to monitor the pressure of each digestion vessel in real time, and the microwave output is stopped when over-pressure occurs to ensure the safety of the experiment.

Explosion-proof design: The whole machine adopts 316L industrial stainless steel structure design, and the internal spraying of multi-layer PFA coating meets the multi-dimensional requirements of impact resistance, explosion resistance, corrosion protection, etc., and the explosion-proof induction device is installed on the outer wall of the furnace cavity to avoid the expansion of danger in an emergency.

The equipment is equipped with an emergency stop button, which has the ability to quickly and effectively cut off the power supply to prevent accidents, and also has dual independent interlocking sensing devices, which cut off the power supply when the furnace door is open, and stop the microwave output when the furnace door is not completely closed, which further improves the safety of operation.

Explosion-proof design: The whole instrument adopts 316L industrial stainless steel structure design with multi-layer PFA coating which meets requirements of impact resistance, explosion resistance, corrosion protection, etc., and the explosion-proof induction device is installed on the outer wall of the furnace cavity to avoid the expansion of danger in case of emergency.

The instrument is equipped with an emergency stop button which has the ability to quickly and effectively cut off the power supply to prevent accidents, and also has dual independent interlocking sensing devices which cut off the power supply when the furnace door is open, and stop the microwave output when the furnace door is not completely closed, greatly improving operation safety.

Special designed digestionvessel: The rotor of the Welso microwave digestion instrument is designed with a dual threaded fastening type for excellent air tightness. The inner vessel is made of imported TFM material precision machining, which has excellent corrosion resistance and stability. The outer vessel is made of PEEK mixed glass fiber material, which has excellent toughness and rigidity, ensuring that it can maintain safe and reliable performance under high temperature and high pressure conditions for a long time.

The design of the vertical blasting high-pressure vessel based on the three-dimensional directional explosion-proof theory of the outer vessel can limit the release of the shock wave along the vertical direction once the vessel bursts, so as to ensure the lateral safety.

The digestion vessel not only successfully passed the pressure resistance test, but also passed the simulation and strengthening application experiment (set at a high temperature of 230°C, maintained the constant temperature for 45min, and carried out more than 100 times in total), but still had no obvious deformation or damage, and was in good working condition, which fully verified its excellent safety and reliability in high-intensity applications.

When choosing a microwave digestion system, in addition to considering the specifications and safety performance of the equipment, the operation experience and later maintenance costs are also important factors that cannot be ignored.

How to focus on operating experience and cost savings?

Welso focuses on the user experience: Whether it is a 7-inch touchscreen or an external 8-inch touchscreen LCD, all operations of the Welso microwave digestion system can be done on the touch screen. The external design allows users to adjust the panel angle according to different ambient light and reduce reflection.

The device comes with a variety of digestion methods, which can be stored and used by the user  and the digestion steps can also be customized according to the needs of the experiment.

According to the requirements, the external touch screen needs to be installed at a distance of about 5cm from the device, and the microwave power is controlled at 5mW/cm2.

WMD1200R, WMD1800R and WMD4000 high-throughput microwave digestion instrument adopts semi-automatic upper lid opening assistance system, which conforms to the explosion-proof mechanical design concept. The instrument can be directly placed on the ground without special laboratory bench which is convenient for the removal and loading of digestion vessels, saves laboratory space and improves work efficiency.

Cost saving: Welso's microwave digestion system is designed to avoid consumables cost such as sealing bowls and explosion-proof disks, and focuses on the durability and reliability of supporting accessories. Ensure that the instrument can not only be used for a long time, but also effectively meet the needs of the laboratory. This greatly reduces the additional cost of frequent consumables replacement, reduces the maintenance of the instrument, and allows the user to focus on the experiment, improving efficiency and reliability. The use of long-lasting accessories helps to ensure the safety and stability of the experimental process, making the instrument most cost-effective.

In addition, when choosing a microwave digestion system, in addition to paying attention to the above contents, we also comprehensively consider the quality of after-sales service and budget of the supplier, and conduct a comprehensive evaluation according to our own experimental needs, long-term use costs and budget. Through reasonable evaluation and selection, users can find the equipment that best meets their needs, helping the laboratory to achieve efficient and safe experimental operations!