Karl-Fischer coulometric titration is a classic method for determining trace moisture in samples in quantitative chemical analysis. It was invented by German chemist Karl Fischer in 1935. It is based on the principle of redox reaction between iodine and sulfur dioxide in the presence of water. Water participates in the reaction as a reactant in the iodine oxidation of sulfur dioxide. The sample’s water content can be accurately known by determining the amount of iodine consumed in the response. Iodine consumption is proportional to the water content. The RDKF-106D oil moisture meter successfully uses this method. The instrument is equipped with advanced automatic control circuits, with a 32-bit embedded microprocessor as the central control core and embedded with a mini operating system. This makes it highly reliable and easy to use, showing advantages such as fast analysis speed, convenient operation, high measurement accuracy, and a substantial degree of automation. Therefore, it is widely used in trace moisture determination in many fields, such as petroleum, the chemical industry, electric power, railways, pesticides, medicine, and environmental protection.
CHARACTERISTIC
1. It uses a 32-bit embedded microprocessor as the central control core, is equipped with a mini operating system, and has stable performance.
2. It supports 0-400mA automatic detection with high precision, fast response, and reliable stability.
3. The mainboard uses high-quality SMD components with high integration, easy operation, and ultra-long service life.
4. The oil moisture meter has four calculation formulas to automatically convert the measurement results into the required units and support interchange between units.
5. It has an extra-large color touch screen and a complete digital keyboard to simplify operation and data calculation quickly and conveniently.
6. It provides a graph curve analysis function to help analyze the changing trend of moisture content.
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FAQ
Q: How do you measure moisture in oil?
A: To measure moisture in oil, a sample is placed onto a high-temperature heating plate (approximately 160°C). The presence of free and emulsified water is identified by observing the formation of bubbles and crackling sounds. The moisture content is then determined based on the intensity and nature of the explosion sound.
Q: What is the acceptable moisture content in oil?
A: The moisture content in the refrigerant should be below 50 PPM, while the maximum allowable moisture level in the oil is below 300 PPM.
Q: What is the unit of moisture in oil?
A: The unit used to measure moisture in oil is *aw* (water activity) or Relative Saturation (% R.S.). These terms refer to the amount of water dissolved in the oil and the maximum water solubility level at a specific temperature.
