the most commonly used in greenhouses are temperature and humidity sensors, carbon dioxide sensors, light level sensors, soil nutrient sensors, etc.

By embedding IoT soil sensors in agricultural soils, farmers can monitor the soil's water content and understand its chemical composition in real time, 24/7. These devices can automatically notify farmers when the water content of the soil or the levels of elements such as nitrogen, potassium, phosphorus and sulfur reach undesirable values.

Soil moisture monitoring systems are mainly used to automatically monitor soil moisture at multiple levels or points. It can also be equipped with soil temperature, soil CO2 and other sensors according to the research needs.

Soil temperature and humidity meter instrument It can measure the temperature and humidity of air and soil. When measuring the temperature and humidity of soil, it should be noted that the probe is equipped with a sheath. When buried in the soil, the soil cannot block the sheath, otherwise it cannot be detected.

For rice fields, water management needs to be controlled reasonably, too much or too little water is not conducive to the growth of rice. The NiuBoL soil moisture monitoring system can realize long-term continuous monitoring of soil moisture. Users can flexibly arrange soil moisture sensors according to monitoring needs; they can also arrange sensors at different depths to measure soil moisture in···

soil moisture meter is a product developed by NiuBoL, also known as non-contact soil moisture meter and soil moisture meter. It is a sensor based on the principle of dielectric constant. It can dynamically observe the soil moisture content of different soil layers, and conduct fast, accurate and comprehensive observations, allowing people to achieve a high degree of soil perception.

Humidity sensors are non-sealed and should be avoided in acidic, alkaline and organic solvent containing atmospheres in order to protect the accuracy and stability of the measurement. Also avoid using in dusty environments. To correctly reflect the humidity of the space to be measured, the sensor should also be avoided to be placed too close to the wall or in a dead corner where there is no air ci···

humidity sensors generally have poor interchangeability. Sensors of the same type cannot be interchanged, which seriously affects the use effect and increases difficulties in maintenance and debugging. Some manufacturers have made various efforts in this regard (but the interchangeability still poor) with better results.

Like measuring weight and temperature, selecting a humidity sensor must first determine the measuring range. Except for meteorological and scientific research departments, those engaged in temperature and humidity measurement and control generally do not need full-humidity (0-100%RH) measurement.

At present, the methods for measuring soil moisture include drying weighing method, tensiometer method, resistance method, neutron method, r-ray method, standing wave ratio method, optical method, time domain reflectometry (TDR) and high frequency oscillation method ( FDR) etc. Among them, the more common and simple methods are drying method and resistance method.