Soil Moisture Sensor and Tensiometer are two common tools used to detect soil moisture, they are two different types of equipment, they are used to measure different physical properties in the soil, the differences between them are as follows: 

1. Principle: Soil moisture sensors estimate soil moisture by measuring the conductivity or capacitance value in the soil. Tensiometers, on the other hand, determine the moisture content in the soil by measuring the capillary force inside the soil. 

2. Measurement range: Soil moisture sensors can usually measure all levels of moisture content in the soil ranging from very dry to very wet. Tensiometers can only measure the moisture content of the soil within a certain range and are usually suitable for situations where the moisture content of the soil is high. 

3. Accuracy: Soil moisture sensors typically have a high degree of precision and accuracy and can provide real-time soil moisture data. Tensiometers are usually less accurate and require frequent calibration to maintain accuracy. 4. Usage: Soil moisture sensors typically need to be inserted deep into the soil to obtain accurate moisture content data. Tensiometers need to be installed on the soil surface and connected to the depth of the soil by a suction hose. 

4. Application scenarios: Soil moisture sensors are used in agriculture, horticulture and landscape irrigation systems. Tensiometers, on the other hand, are often used to measure water pressure in the soil, for example in the fields of soil mechanics and soil engineering. 

Soil moisture sensors are mainly used to measure the moisture content in the soil. These sensors can detect moisture in the soil in a variety of ways, such as capacitive sensors (which measure changes in the dielectric constant of the soil) or resistive sensors (which measure changes in the electrical resistance of the soil). They are commonly used in agriculture, horticulture and environmental monitoring to help optimize irrigation, manage water resources and assess soil health. 

Tensiometers (also known as soil tensiometers), on the other hand, are used to measure the water pressure in the soil or the tightness of the soil. It provides an indicator of the soil's ability to hold water and the conditions under which plant roots can grow. Tensiometers are commonly used in the study of soil physics and plant physiology, especially in assessing irrigation needs, soil amendments and crop management. 

In conclusion, although both soil moisture sensors and tensiometers can be used to monitor soil moisture, they differ in principle, measurement range, accuracy, usage and application scenarios. It is necessary to choose the right testing tool for the specific application needs.

Agriculture Sensors Catalog

Agriculture-Sensors-Catalog-NiuBoL-2024.pdf