Guide: According to the different moisture content in different forms of samples, different requirements for measuring moisture are proposed. Moisture measurement can be controlled and analyzed by a trace moisture analyzer produced in industry, or it can be the quality signature of industrial and agricultural products; it can be measured from tons of products, or it can be analyzed in the laboratory with only a few microliters of test solution .
1. Drying principle of coal moisture analyzer:
In the microwave oven, the magnetron radiates microwave with a frequency of 2450MHz, forming a microwave energy field in the furnace cavity. This microwave energy field continuously changes the positive and negative polarities at a rate of 2.45 billion times per second, causing the sample to bring Polar water molecules change direction with high frequency as the polarity of the electric field changes. In the process of high-speed movement, the molecules will collide with each other violently and generate heat. The electromagnetic energy is converted into heat energy, which causes the temperature of the water molecules to rise and vaporize and evaporate, thereby drying the sample.
2. Measuring principle of coal moisture analyzer
Weigh a certain amount of samples with a particle size of less than 6mm and place them in the furnace body of the microwave moisture analyzer. The magnetron in the furnace emits microwaves, which causes the water molecules to vibrate at a high speed, generate frictional heat, and quickly evaporate. Calculate the moisture content based on the mass loss of the sample after drying.
The main parameters:
1) Power supply: 220V50Hz
2) Rated input power: microwave: 1300W; infrared: 850W
3) Microwave output power: 750W
4) Number of samples: 1-8
5) Microwave frequency: 2450MHz
6) Single sample weight: 10-12g (analysis water is 0.9-1.1g)
7) Weighing resolution: 0.001g (analysis water is 0.0001g)
8) Sample size: no more than 6mm (analysis water is no more than 0.2mm)
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