Soil humidity sensor 4-20mA

Product Details: NBL-S-THR Soil Temperature and Humidity Sensor

NBL-S-THR Soil Temperature and Humidity Sensor, as an advanced measuring device combining high accuracy and high sensitivity, is designed for soil moisture monitoring. It adopts the innovative electromagnetic pulse technology, which is precisely transmitted to the special probe through the coaxial cable, and penetrates deep into the soil to directly measure the apparent dielectric constant of the soil, thus accurately calculating the real moisture content of the soil. This technology not only ensures fast and accurate measurements, but also greatly improves the stability and reliability of the sensor, maintaining excellent measurement performance even in complex soil environments containing fertilizers or metal ions.

NBL-S-THR soil temperature and humidity sensor core features:

High-accuracy measurement: through a precision algorithm to parse the reflected signal of the electromagnetic wave pulse, it realizes the accurate measurement of soil humidity in the range of 0 to 100%, with the error controlled within ±3%.

Wide Temperature Range: Supporting a wide range of soil temperature measurement from -50~100℃, it is suitable for various extreme climate conditions and ensures accurate monitoring throughout the year.

High resolution: soil moisture resolution up to 0.1%, temperature resolution up to 0.1℃, subtle changes can also be accurately captured.

High sensitivity and stability: The sensor is cleverly designed to capture soil moisture changes sensitively, while not being interfered by impurities in the soil, and remains stable and reliable in long-term operation.

Stable output: 4-20mA standard output form, strong compatibility, easy to integrate into various monitoring systems.

Flexible power supply: DC 12-24V power supply mode, adapt to a variety of power supply environment.

Wide applicability: suitable for soil moisture monitoring, water-saving irrigation systems, greenhouse greenhouse management, grass pasture maintenance, soil science research and rapid testing and many other fields.

NBL-S-THR Soil humidity sensor 4-20mA Technical parameters:

Power supply: DC 12-24V, flexible to adapt to different power supply environments, convenient installation.

Resolution: soil humidity up to 0.1%, temperature accuracy to 0.1 ℃, subtle changes in the grasp.

Accuracy: soil moisture measurement error of no more than ± 3%, temperature measurement error within ± 0.5 ℃, to ensure accurate data.

Output form: adopts the international common 4-20mA current loop output, which is convenient for long-distance transmission, reduces signal attenuation, and is compatible with a variety of data acquisition systems, realizing seamless connection.

The soil humidity sensor adopts 4-20mA output form, which is based on the standard analog signal transmission method widely used in the field of industrial automation.

This output form has the following features and advantages: 

1. Strong anti-interference ability: current signals compared to voltage signals in long-distance transmission is more resistant to signal attenuation caused by line resistance and external electromagnetic interference, to ensure the stability and accuracy of the signal. 

2. Self-powered features: in the two-wire system, the 4-20mA signal line as both the power line and the signal line, the sensor from the PLC or data collector to provide 12-24V DC power supply to obtain the working current, reducing the need for additional power lines, simplifying the wiring and reducing costs. 

3. Direct correspondence between linear output and measured value: In soil moisture sensors like NBL-S-THR, changes in soil moisture are directly converted to changes in 4-20mA current.

4. For example, when the soil humidity is 0%, the output current is close to 4mA; when the humidity reaches 100%, the output current is 20mA. current type (3-wire 4-20mA output) calculation formula:

Soil humidity R = (I-4 ) / (20-4) × 100%

Soil temperature T = (I-4) / (20-4) × 150 -50

where I is the current current reading and R is the calculated soil moisture value, ensuring intuitive and accurate measurements. 

NBL-S-THR Soil humidity sensor 4-20mA application scenario example:

In water-saving irrigation system, NBL-S-THR sensor can monitor soil humidity in real time and intelligently adjust the irrigation amount according to the crop water demand, effectively saving water resources.

In greenhouse greenhouses, combined with the temperature and humidity monitoring system, it provides the best growing environment for plants and improves crop yield and quality.

In grassland pasture management, it helps herdsmen accurately grasp the moisture condition of the grassland, reasonably arrange the grazing time, and protect the ecological environment.

NBL-S-THR soil temperature and humidity sensor, with its excellent performance and wide range of application potential, has become an indispensable assistant in modern agriculture, environmental monitoring and scientific research.

Soil Moisture Temperature sensor data sheet

NBL-S-THR-Soil-temperature-and-moisture-sensors-Instruction-Manual-V4.0.pdf