Classification of moisture analyzers and their main applications
Physical analysis and chemical analysis are the two main categories into which moisture analysis techniques fall. Several moisture analysis techniques have gradually superseded traditional moisture analysis techniques. Karl Fischer moisture analyzers, infrared moisture meters, dew point moisture meters, microwave moisture meters, and Coulomb moisture meters are the primary moisture analyzers available today. likewise some unique moisture meters. These instruments' measurement techniques are simple to use, very sensitive, have good reproducibility, and can continually measure and automatically display data.
Overseas moisture analyzers are more accurate and stable, but they are also more expensive, making them unaffordable for some domestic laboratories and businesses. Numerous domestic instrument manufacturers have recently increased their research and application of moisture analyzers, achieving very clear advantages that have brought the various technologies of domestic moisture analyzers closer to the level of those used internationally and can satisfy the requirements of general laboratories and industrial production.
The accuracy and measurement range of the Karl Fischer French classic method have recently been considerably improved, and it has been recognized as a standard method for determining moisture in numerous substances. In recent years, foreign brands such as France's Raymond, Switzerland's Metrohm, Germany's Mettler-Toledo, Germany's Schott, and Japan's Kyoto Electronics have been more active on the local market than domestic brands, which mostly manufacture Karl Fischer moisture analyzers. There are companies like Jiangsu Jianghuan Analytical Instrument Co., Ltd., Haidian Chaosheng, and Pioneer Weifeng.
The infrared moisture meter is simple to use, takes up little time, and provides precise results. In the experimental analysis, daily purchasing control, and process inspection of the chemical, pharmaceutical, food, tobacco, grain, and other industries, the infrared moisture meter can therefore be widely utilized. The United States, Germany, Sartorius, Japan, kett, Shanghai Precision Scientific Instrument Company, Beijing Institute of Chemical Metallurgy, Beijing Jiuru Instrument Co., Ltd., and other countries are among the major producers.
The dew point moisture meter is simple to use, the equipment doesn't require much expertise, and the measured results are typically adequate. It is frequently employed to find minute amounts of moisture in hazardous gases. Unfortunately, there is a lot of interference with this approach, and some easily cooled gases will condense before water vapor and produce interference, especially when the concentration is high. The British Shaw Company, Ametek, and other manufacturers are among them.
To measure the moisture content in gases, coulometric moisture analyzers are frequently employed. This technique is extremely useful for finding minute amounts of moisture in gas because it is quick and simple to use. It is quite challenging to determine using normal chemical techniques. Nevertheless, alkaline compounds or conjugated dienes cannot be determined using the electrolysis approach. Manufacturers include Daqing Rishang, Jiangsu Jianghuan Corporation, and Chengdu Instrument Factory.
The sample is dried by the microwave moisture analyzer using the microwave field, hastening the drying process. It has a wide variety of applications and the qualities of quick measurement, practical operation, high precision. It is appropriate for products made of grain, paper, wood, textiles, and chemicals. It is also possible to use the method for determining moisture in liquid samples like gasoline, kerosene, and other liquids in addition to powdery and viscous solid materials. Manufacturers include Changsha Youxin Company, American CEM Company, and American Omnimark Company, among others.
Additionally, some specialized moisture analyzers are taking up more and more market share. The specificity and ease of use of this type of moisture tester are benefits. Some examples include oil moisture meters, soil moisture meters, tobacco moisture meters, grain moisture meters, wood moisture meters, concrete moisture meters, and paper moisture meters, among others.
