The soil moisture meter is mainly used for rapid detection of soil moisture content and is widely used in agricultural irrigation, soil monitoring, and scientific research fields, helping to scientifically manage soil moisture to meet crop growth needs.
Instruments usually consist of sensors, display screens, and portable hosts, supporting GPS positioning, multi-channel data storage, and wireless transmission functions. Some models can simultaneously detect soil temperature, with a measurement range covering 0-99% moisture content and -40 ℃~100 ℃ temperature. Adopting low-power design, equipped with aluminum alloy box or split structure, suitable for outdoor work environment. The probe needs to be inserted vertically into the soil to avoid interference, and the built-in digital filtering technology can reduce the impact on saline alkali environments.
The instrument emits electromagnetic waves of a certain frequency, which propagate along the probe and return to the bottom to detect the voltage output by the probe. As the change in soil dielectric constant depends on the soil moisture content, the soil moisture content can be calculated from the relationship between the output voltage and moisture.
The core principle of soil moisture measuring instrument is based on frequency domain reflection technology, and its workflow is as follows:
Electromagnetic wave emission and reception: The sensor emits electromagnetic waves of a specific frequency, which penetrate deep into the soil along the probe and reflect back to the detection probe after reaching the bottom.
Voltage signal conversion: Reflected electromagnetic waves are converted into voltage signals, and their intensity is directly related to the soil dielectric constant.
Moisture content calculation: As the soil dielectric constant mainly depends on the moisture content, the volumetric moisture content of the soil can be calculated by measuring the voltage value (unit:%).
Product Features:
Large screen Chinese LCD display, thin film buttons, real-time display of moisture value, number of groups, and low voltage warning
Special aluminum alloy carrying case, lightweight and convenient for field operations
Different models have different functions, and users can choose according to their actual needs (see function comparison table for details)
Windows software: Data download and storage, files can be directly imported into EXCEL.