Functions and characteristics of soil temperature and humidity meter

Soil temperature and humidity meter, also known as soil temperature and humidity measuring instrument and soil temperature and humidity tester, can detect and record two parameters: soil temperature and soil moisture.

1. High measurement accuracy, large storage capacity, small size, easy to carry.

2. It can work independently from the computer, the upper computer software is powerful, the data viewing is convenient, the recorded data can be exported to the computer at any time, and can be stored as an exce** file, generating a data curve for other analysis software to further process the data, and the computer can be connected to print and store the data.

3. Wide range of uses: It can be used for long-term monitoring of farmland, water conservancy, forests, lawns, highways, railways, etc., and can continuously monitor the moisture temperature of the soil, with stable performance, high reliability and maintenance-free.

TZS-2X-G Soil Temperature and Humidity Meter (Top).

Soil moisture sensor is also known as: soil moisture sensor, soil moisture sensor, soil moisture sensor. Mainly used to measure soil volume water content, soil moisture monitoring and agricultural irrigation and forestry protection, the soil moisture sensors commonly used at present are FDR type and TDR type, that is, frequency domain type and time domain type.

At present, the more popular is FDR type, commonly used model Domain reflectometry) frequency domain reflectometry is an instrument used to measure soil moisture, it uses the principle of electromagnetic pulse, according to the electromagnetic wave propagation frequency in the medium to measure the apparent permittivity of the soil ( ) so as to obtain the soil volume water content (V), FDR has the advantages of simple and safe, fast and accurate, fixed-point continuous, automated, wide range, less calibration, etc. It is a recommended instrument for measuring soil moisture. Technical parameters, applications and characteristics of FDR type.

There are many kinds of this, and it is not easy to explain it in a few words. The most important thing is to actually compare, consistency and stability are the most important.

Aoki Sensing, a professional provider of soil environmental measurement technology.

Summary. Dear, I'm honored to have your question The information that the teacher has found for you here is: how deep is the soil moisture monitored by soil moisture:

Soil moisture is monitored at a depth of 100 cm and measured at a depth of 100 cm below the surface, with a soil layer taken every 10 cm (the surface layer is divided into 10 cm). Take four repetitions for each soil layer. The non-fixed lot changes with the transfer of the main crop fertility observation lot.

The dates, stratification and number of repetitions were the same as for fixed lots, but the depth was changed to 50 cm. Soil moisture is a very important variable in the study of terrestrial water and energy cycles. It can not only affect the distribution ratio of net radiant energy into latent heat and sensible heat, but also affect the detection of precipitation into infiltration

Dear, I'm honored to have your question The information that the teacher found for you here is: what depth of soil moisture is monitored by soil moisture: soil moisture is monitored by soil depth is 100 cm, the depth is measured 100 cm below the surface, and a soil layer is taken every 10 cm (the surface layer is divided into 10 cm).

Take four repetitions for each soil layer. The non-fixed plots vary with the age of the main crop fertility observation plots. The dates, stratification and number of repetitions were the same as for fixed lots, but the depth was changed to 50 cm.

Soil moisture is a very important variable in the study of terrestrial water and energy cycles. It can not only affect the distribution ratio of net radiant energy into latent heat and sensible heat, but also affect the detection of precipitation into infiltration

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The selection of soil temperature and humidity sensor and environmental temperature and humidity sensor has the following differences:

1.Measurement parameters are different:

Soil temperature and humidity sensors are mainly used to measure temperature and humidity in the soil, while ambient temperature and humidity sensors are used to measure temperature and humidity in the surrounding environment.

2.The use environment is different:

Since the soil temperature and humidity sensor is used in the underground environment, it needs to have the functions of waterproof, moisture-proof, dust-proof, etc.; The ambient temperature and humidity sensor is generally used for indoor or outdoor environmental monitoring, so it needs to have functions such as sun protection, wind protection, and sand protection.

3.The sensor structure is different:

Since the soil temperature balance and humidity sensor will be buried in the soil for measurement, the stability and durability of the sensor structure need to be considered. The ambient temperature and humidity sensor is generally lightweight and can be easily installed on the wall, forest ceiling and other places.

4.The measuring range and accuracy are different:

The measurement range and accuracy of soil temperature and humidity sensors are generally small, because the temperature and humidity in the soil change slowly; The measurement range and accuracy of the ambient temperature and humidity sensor are generally large, because the temperature and humidity in the surrounding environment change rapidly.

Therefore, when selecting a sensor, it is necessary to determine which type of sensor to use according to the specific application scenario and needs.

Soil moisture meter is also known as tensiometer, pressure gauge. It is constructed as a vacuum gauge connected to a clay tube, which is filled with water when used to maintain a vacuum. Its measuring principle:

The hygrometer that is full of water and treated is buried in the measured soil, because the soil water is unsaturated and has a certain suction, it is necessary to absorb water from the clay pipe wall. The clay pipe is not breathable, at this time the instrument will produce a certain vacuum, so that the pressure shows a negative air pressure value, when the instrument and the soil suction are balanced, this negative pressure value is the soil water suction. Soil moisture can be derived when there is a known relationship between soil water suction and soil moisture.

Here's how a soil moisture meter works:

The soil moisture of plants is measured by electrolytic values of organic nutrients in the soil, which can be read by inserting a probe into the root without the need for batteries. Accurate and effective measurement of moisture in plant soil; Accurately grasp the suitable conditions for the growth of various plants; Insert the probe into the root soil to read the accurate soil moisture, moist is the moisture bond, corresponding to the table is moist, dry is dry, wet is wet, the value 1-3 (red part) indicates that watering is needed, 4-7 (green part) is appropriate, please adjust the watering time according to the variety of plants, 8-10 (blue part) means that it is too wet. When using, pay attention not to touch the stone when inserting the electrode, and do not use too much force, otherwise it is easy to hurt the electrode.

Wash the electrodes after use.

Hope it helps. Thank you.

There are several ways to measure the moisture of soil:

Gravimetric method. Take a soil sample to dry, weigh its dry soil weight and water content weight and calculate.

Resistance method. Measured using a resistive soil moisture meter. Soil moisture is determined according to the relationship between the conductivity of the soil solution and the soil moisture content.

Negative pressure gauge. Measured using a negative pressure gauge. When the water absorption of unsaturated soil is balanced with the negative pressure in the device, the negative pressure shown in the pressure gauge is the soil water absorption, and then the soil water content is calculated accordingly.

Neutron method. It is determined using a neutron detector. The moderation ability of fast neutrons emitted by neutron sources in the soil is related to the soil moisture content, which can be determined by pre-calibration.

Remote sensing. Soil moisture is determined over a large area of the ground surface through the interpretation of low-altitude or satellite infrared remote sensing images.

Measuring the moisture content of the soil is actually a matter of measuring the moisture content of the soil.

No matter what method is used, it is impossible to describe the water content of a field field without knowing the spatial heterogeneous variability. Although there was a tendency for soil to move towards equilibrium soil moisture potential, it was not well correlated with equilibrium water content. Nevertheless, the variability of the coefficient of change (standard deviation of the mean), which is expressed in the characteristic range of 15-35%.

When the water content appears to have a limited range of spatial confidence, the variability of the water content decreases with the decrease of the observed scale.

When collecting soil, it is stored in an aluminum box to prevent water evapotranspiration, and the aluminum box + wet soil weight is weighed in time, and the aluminum box + dry soil weight is weighed after drying at 105 degrees, and the soil moisture content is obtained by subtracting the two.

Measuring the moisture of the soil is actually to detect the moisture content of the soil, there are several methods, you can go to the geotechnical test to know. Or you can go to your local laboratory for a consultation.

The moisture content of the soil can be determined using the 105 drying method.

Hello! Kiss! The detection range and measurement method of different soil moisture sensors may vary slightly, but in general, the humidity detected by the soil moisture Xiaozhen reed sensor can range from very dry (e.g., 0%) to very wet (e.g., 100%).

In practice, people usually set a threshold of soil moisture (e.g. 30%), and when the soil moisture falls below this threshold, the sensor will send out an alarm or trigger some action. This threshold can be set according to the specific application needs, such as the optimal soil moisture required for crop cultivation, which is usually 50% to 80%. It is important to note that different plants, soils, and habitat environmental conditions have different soil moisture requirements, so setting the appropriate soil moisture threshold needs to be adjusted on a case-by-case basis.