What are Types of Moisture Meters?
Moisture meter (moisture tester) is an instrument for quickly measuring moisture content. It is mostly used for moisture control in various industries such as food, chemical industry, plastics, agriculture and forestry. According to different working principles, moisture meters can be divided into the following types.
8 Types of Moisture Meters
- Infrared moisture meter. It is a new type of rapid moisture detection instrument. When the moisture analyzer measures the weight of the sample, the infrared heating unit and the moisture evaporation channel quickly dry the sample. During the drying process, the moisture analyzer continuously measures and instantly displays the lost moisture content of the sample in %. After the drying process is completed, the final measured moisture content values are locked and displayed.
- Halogen moisture meter. The halogen heating rapid moisture analyzer is a new type of rapid moisture detection instrument. The ring-shaped halogen lamp ensures uniform heating of the sample, easy operation and accurate measurement. While the moisture analyzer measures the weight of the sample, the instrument adopts the halogen heating method of the annular tube to quickly dry the sample.
- Microwave moisture meter. Microwave moisture analyzer uses microwave field to dry samples, accelerates the drying process, short measurement time, convenient operation and high accuracy, suitable for moisture determination in petroleum, kerosene and other liquid samples.
- Pin-type moisture meter. It uses the electrical conductivity of the measured object to measure the moisture. The higher the moisture content, the greater the corresponding electrical conductivity. The moisture value can be measured by measuring the electrical conductivity of the measured object. ATO offers several types of pin-type moisture meters, including digital grain moisture tester, wood moisture meter, hay moisture tester and soil moisture meter.
- Induction moisture meter. It is a kind of microwave moisture meter, the moisture content is high, the dielectric constant of the measured object is large, and the corresponding equivalent capacitance becomes larger. The moisture value can be measured by measuring the equivalent capacitance of the measured object.
These moisture meters are all physical analysis moisture meters. This type of moisture meter has a relatively simple structure and does not require such complicated experiments. It detects quickly and evaporates free moisture by heating to a certain temperature. Although the accuracy is not as high as that of the chemical analysis method moisture meter, it can also reach 1/10000 (1ppm).
- Karl Fischer moisture meter. Karl Fischer method is a classic method, also known as a trace moisture analyzer, which is mainly used in the detection of samples with low moisture content. After improvement, the accuracy has been improved and the measurement range has been expanded.
- Dew point moisture meter. The dew point moisture meter is easy to operate and is often used for the determination of trace moisture in permanent gases. However, this method has more interference, and some gases that are easy to cool and exchange, especially when the concentration is high, will condense before water vapor and cause interference.
- Coulomb moisture meter. Coulometric moisture analyzers are often used to determine the moisture content in gases. This method is easy to operate and quick to respond and is especially suitable for the determination of trace moisture in the gas. It is very difficult to measure by a general chemical method. However, electrolysis is not suitable for the determination of alkaline substances or conjugated diolefins.
The above three moisture meters are all chemical analysis moisture meters. It refers to the change of the substance, that is, the formation of a new substance, which is mainly used for the determination of trace moisture.
