Applications of soil temperature sensor

Soil moisture sensor is also known as: soil moisture sensor, soil moisture sensor, soil moisture sensor. Mainly used to measure soil volume water content, do soil moisture monitoring and agricultural irrigation and forestry protection. The commonly used soil moisture sensors are FDR type and TDR type, namely frequency domain type and time domain type. FDR (Frequency Domain Reflectometry) frequency domain reflectometry is currently more popular. It is an instrument for measuring soil moisture. It uses the principle of electromagnetic pulse to measure the apparent dielectric constant (ε) of the soil according to the frequency of electromagnetic wave propagation in the medium. ) to obtain the soil volumetric water content (θv). FDR has the advantages of simplicity and safety, fast and accurate, continuous fixed point, automation, wide range, and less calibration. It is a recommended soil moisture measuring instrument.

Soil temperature sensor error sources:

The error of the temperature sensor mainly comes from two aspects. On the one hand, the error comes from the matching measurement and control circuit system. However, sub-microwatt detection circuits can effectively reduce sensor self-heating errors. The resolution of the signal detection circuit can be better than 0.01℃, and the accuracy can reach 0.1℃ or even higher. On the other hand, the error comes from solar radiation. When the solar radiation reaches the surface of the temperature sensor, the temperature rise of the temperature sensor caused by radiation absorption will be superimposed on the real atmospheric temperature measured by the temperature measuring element. Heating, the temperature rise caused by radiation heating can be called solar radiation heating error (abbreviated as radiation error).

Applications of soil temperature sensor:

The soil temperature sensor is widely used in the measurement and research of agriculture, forestry, geology, farmland, water conservancy, forest, lawn, highway, railway maintenance and other aspects. The intelligent soil temperature monitoring recorder adopts a rain-proof design. The soil temperature sensor has the characteristics of fast response and long-term operation in a humid environment. It can simultaneously monitor the temperature of soil, atmosphere, water, etc. in real time, with high measurement accuracy and good consistency of soil temperature sensors. , large storage capacity, small size, easy to carry. The soil temperature sensor can continuously monitor the soil temperature, with stable performance and high reliability,Maintenance free.