The moisture analyzer covers physical measurement methods (such as weight loss method, distillation stratification method) and chemical measurement methods (such as Karl Fischer method), and can be customized for different forms of substances (solid, liquid, gas, and slurry). It is widely used in multiple industries such as pharmaceuticals, food, and textiles, especially in online devices using near-infrared technology, which can achieve dynamic monitoring without damaging the sample and is suitable for process control of valuable samples or complex process conditions.

Three different principles of moisture analyzer:

1. Drying method (thermogravimetric principle): This is a common working method. The instrument uses a ring tube halogen heating method to quickly dry the sample, and continuously monitors its mass changes while measuring the weight of the sample. As the moisture evaporates, the system records the percentage of moisture lost during the drying process of the sample. Calculate the percentage content of water by comparing the ratio between the dried mass and the initial wet weight. This method is suitable for solid, granular, or powdery substances, especially for scenarios that require high-precision data.

2. Online method (near-infrared light absorption principle): mainly used in continuous automated production environments. It utilizes the characteristics of the internal molecular structure of matter, such as oxygen hydrogen bonds in water and carbon hydrogen bonds in organic matter, which absorb near-infrared light of specific wavelengths. When light shines on the object being measured, the energy of the reflected light is inversely proportional to the amount of water it contains. By using a built-in digital signal processing chip to analyze, store, and display the received signals, fast and accurate moisture content determination can be achieved. This method has the advantage of non-contact measurement and will not damage the sample.

3. Karl Fischer method (quantitative analysis of chemical reactions): The reaction based on iodine oxidation of sulfur dioxide requires the participation of water. Specifically, the reaction is reversible; In order to make the reaction proceed to the right, it is necessary to add reagents such as anhydrous pyridine to stabilize the product and coordinate with the electrochemical reaction in the electrolytic cell. According to Faraday's law of electrolysis, the amount of iodine produced by electrolysis can accurately calculate the trace moisture content in the sample. This method is commonly used for trace moisture detection in fields such as medicine and chemical engineering.