The moisture detector's categorization and detection methodology
1. Definition of moisture detector:
The moisture detector is used to quickly determine the moisture content of the material, and can provide real-time temperature, sample quality, dehydration rate, sample moisture percentage, etc.
Second, the classification and main application of moisture meter:
With the development of scientific research and the improvement of production technology, the quantitative analysis of moisture has been listed as one of the basic items in the physical and chemical analysis of various substances, as an important quality index of various substances. According to the different moisture contents in different forms of samples, different requirements for the determination of moisture are put forward. Moisture determination can be the control analysis of industrial production, or the quality certification of industrial and agricultural products; it can measure moisture from tons of products, and it can also use only a few microliters of test solution for moisture analysis in the laboratory; it can contain Constant moisture analysis with a water content of a few percent to tens of percent, or trace moisture analysis with a water content of less than one millionth.
Moisture analysis methods can generally be divided into two categories, namely physical analysis and chemical analysis. Classical moisture analysis methods have been gradually replaced by various moisture analysis methods. The main moisture analyzers currently on the market are Karl Fischer moisture analyzers, infrared moisture analyzers, dew point moisture analyzers, microwave moisture analyzers, and Coulomb moisture analyzers. Moisture analyzers, and some special moisture analyzers. The determination methods of these instruments are easy to operate, high in sensitivity and good in reproducibility, and can measure continuously and display data automatically.
Foreign moisture analyzers have certain advantages in terms of accuracy and stability, but they are expensive, which some domestic laboratories and enterprises cannot afford. In recent years, many domestic instrument manufacturers have strengthened the research and practice of moisture analyzers, and achieved very significant benefits, making the various technologies of domestic moisture analyzers approach the international level, which can meet the needs of general laboratories and enterprise production.
The Karl Fischer French classic method has been improved in recent years, greatly improving the accuracy and expanding the measurement range, and has been listed as a standard method for the determination of moisture in many substances.
The infrared moisture analyzer is easy to operate, less time-consuming, and the measurement result is accurate. Therefore, the infrared moisture analyzer can be widely used in the experimental analysis and daily purchase control and process detection of chemical, pharmaceutical, food, tobacco, grain and other industries. The main manufacturers include Shanghai Jiashi Electronic Technology Co., Ltd. and so on.
The dew point moisture meter is easy to operate, the instrument is not complicated, and the measured results are generally satisfactory. It is often used for the determination of trace moisture in persistent gases. However, this method has a lot of interference, and some easy-to-cool gases, especially when the concentration is high, will condense before water vapor and cause interference. Producers include British Shaw Company, AMETEK and so on.
Susai moisture analyzer is commonly used to measure the moisture contained in the gas. This method is easy to operate and responds quickly, and is especially suitable for the determination of trace moisture in gas. If it is determined by general chemical methods, it is very difficult. However, the electrolysis method is not suitable for the determination of alkaline substances or conjugated dienes.
In addition, some special moisture analyzers occupy an increasingly prominent position in the market. This kind of moisture analyzer has the advantages of specificity and simple operation. Quality signing, such as oil moisture meter, soil moisture meter, tobacco moisture meter, grain moisture meter, wood moisture meter, concrete moisture meter, paper moisture meter, etc.
