How to choose a box type experimental muffle furnace?

When choosing a box type experimental muffle furnace, multiple key factors need to be considered to ensure that the selected equipment can meet the experimental or production needs. Here are some key purchasing points:
1. Temperature range and stability
Temperature range: Select the maximum working temperature of the muffle furnace according to the specific needs of the experiment or production. Generally speaking, the temperature range of the muffle furnace used in experiments is wide, ranging from several hundred degrees Celsius to several thousand degrees Celsius.
Temperature stability: Considering the temperature fluctuations of the muffle furnace during long-term operation, choose equipment with high temperature control accuracy and good stability.
2. Furnace size and material
Furnace size: Select the appropriate furnace size based on the size, quantity, and shape of the sample to be processed. The furnace volume should be large enough to accommodate all samples and leave appropriate space to ensure temperature uniformity.
Furnace material: The furnace material directly affects the insulation performance and durability of the muffle furnace. Common furnace materials include fiber materials and refractory brick materials. Fiber material is lightweight and has good insulation performance, while refractory brick material has a hard texture and high temperature resistance.
3. Heating element and power
Heating element: Select the appropriate heating element according to the required temperature range. Generally speaking, resistance wires can be used below 1200 ℃, silicon carbon rods can be used at 1300 ℃ and 1400 ℃, and silicon molybdenum rods can be used at 1400 ℃ and 1700 ℃.
Power: The power level determines the heating speed and efficiency of the muffle furnace. When selecting power, it is necessary to consider the actual needs of experiments or production as well as energy consumption costs.
4. Control system and safety
Control system: Choose a muffle furnace with advanced control systems, such as programmable logic controllers (PLCs), touch screens, etc., to achieve precise temperature control and automated operation.
Safety: Consider the safety performance of the muffle furnace, including functions such as overheating protection, leakage protection, and over temperature alarm. In addition, attention should be paid to the ease of operation and maintenance of the equipment.
5. Other factors
Power supply voltage: Confirm whether the power supply voltage of the muffle furnace matches the power supply in the laboratory or production workshop.
Net weight and size of furnace body: Consider the total weight and size of the furnace body to ensure that the equipment can be easily installed and moved.
Brand and after-sales service: Choose well-known brands and reputable suppliers to ensure the quality of equipment and the reliability of after-sales service.
In summary, when selecting a box type experimental muffle furnace, it is necessary to comprehensively consider multiple factors such as temperature range, furnace size and material, heating elements and power, control system and safety. By carefully comparing products from different brands and models, choose the equipment that best suits your experimental or production needs.