Soil Moisture Sensor

NiuBoL Soil Moisture Monitoring System: Scientific Insight Beneath the Surface, Revolutionizing Water Management in Smart Agriculture  

Soil Moisture Monitoring: The Foundational Scientific Infrastructure of Modern Agriculture 

In modern agriculture, smart irrigation, and water resource management systems, soil moisture is the most critical, hardest-to-obtain, yet most yield-determining fundamental parameter. In the past, farmers relied on manual pit digging, hand-feel judgment, and empirical irrigation — methods that lacked precision and could not adapt to today’s trends of large-scale, water-saving agriculture. 

The NiuBoL Soil Moisture Monitoring System uses Frequency Domain Reflectometry (FDR) technology based on dielectric constant measurement as its core. It emits stable high-frequency detection waves deep into the soil, continuously monitoring moisture, temperature, and even tilt status across different soil layers, providing reliable decision-making data for smart agriculture and making the “invisible asset” of soil quantifiable, manageable, and automatable. 

To meet the needs of different crops and engineering monitoring scenarios, NiuBoL has launched two core product lines: 

- NBL-S-TM Soil Temperature & Moisture Sensor (Single-point type)  

- NBL-S-TMSMS Multi-layer Soil Moisture Monitoring Tube (Multi-depth profile type) 

Together, they form a complete monitoring ecosystem from single-point to multi-depth soil profile measurement, applicable to agriculture, water conservancy, forestry, meteorology, and geological hazard warning.

 Soil Moisture Sensor: The Core Tool for Precise Soil Water Insight 

The accuracy and stability of a soil moisture sensor determine the “neural response speed” of the entire irrigation system. NiuBoL adopts dielectric constant (FDR) technology that penetrates the PVC shell and directly senses soil moisture changes, offering the following clear advantages: 

- Unaffected by salinity — suitable for all soil types  

  Traditional resistance-based sensors are often affected by salinity, causing measurement fluctuations. NiuBoL sensors use non-contact measurement without forming an electrical circuit with the soil, so fertilizers, pesticides, salinity, and irrigation frequency do not affect accuracy. 

- Highly adaptable to various agricultural scenarios with excellent long-term stability  

  Fully epoxy-potted and sealed waterproof internal structure, acid- and alkali-resistant materials, can be buried in soil or water for many years, meeting the harsh requirements of greenhouses, open fields, orchards, pastures, etc. 

- Automatic data upload for intelligent management  

  Sensor data can be transmitted to the cloud platform via RS485 or 4G/5G/WiFi networks. Users can view real-time soil moisture data anytime via mobile phone or computer to guide irrigation, fertilization, and drought response.

- Environmentally friendly, non-destructive, non-contact design  

  Probes do not apply current to the soil, avoiding interference with plant roots — safer and more eco-friendly. 

 NBL-S-TM Soil Temperature & Moisture Sensor: Industry-Standard Device with High Precision, Strong Corrosion Resistance, and Long Lifespan 

The NBL-S-TM is an industrial-grade soil temperature and moisture sensor widely used in smart agriculture and scientific research. It simultaneously measures soil temperature and moisture with the following features: 

- FDR measurement principle for accurate and stable data  

- Special alloy electrodes, impact- and corrosion-resistant  

- IP68 protection rating, suitable for long-term submersion  

- Black flame-retardant epoxy resin potting, fully sealed and anti-aging  

- Plug-in design for fast and accurate measurement  

- RS485 Modbus protocol with strong compatibility  

- Full climate operation from –40°C to 85°C

NBL-S-TM Technical Specifications 

Applicable to agricultural irrigation systems, greenhouses, pastures, flower horticulture, scientific experiments, and various soil moisture monitoring scenarios.

NBL-S-TMSMS Multi-layer Soil Moisture Monitoring Tube: Flagship Solution for Deep Profile Monitoring;

To understand water storage capacity, root depth, and infiltration at different soil depths, multi-layer monitoring systems have become essential tools in modern agriculture, forestry, water conservancy, and engineering stability monitoring. 

The NBL-S-TMSMS uses high-frequency FDR technology combined with a plastic tube structure to achieve continuous synchronized monitoring of multiple soil depths, with the following advantages: 

- Up to 10 customizable sensing nodes for deep profile monitoring  

  Standard layers at 10/20/30/40 cm depths; up to 10 layers can be customized according to crop type or engineering needs. 

- All-plastic tube + epoxy potting for long-term burial  

  Acid- and alkali-resistant, anti-aging, watertight, highly corrosion-resistant, ideal for long-term outdoor use. 

- Optional 4G wireless module for remote monitoring  

  No wiring required; data is directly uploaded to the cloud platform — perfect for remote areas. 

- Optional tilt sensor for geological hazard warning  

  Based on 3D-MEMS technology, monitors stratum displacement and tilt, widely used in riverbanks, dams, slope safety, and soil settlement warning. 

- Multiple electrical protections to prevent miswiring and damage  

  Power and signal lines feature anti-reverse and anti-misconnection protection for safer installation. 

Applicable to crop irrigation, water resource management, drought monitoring, forestry ecology, soil and water conservation, geological disaster monitoring, and many other fields.

 Soil Moisture Monitoring Station: Comprehensive Insight from Shallow to Deep Layers 

The NiuBoL Soil Moisture Monitoring Station integrates multiple sensors and uploads data in real time via 4G network with visual platform management. Key advantages: 

- Simultaneous shallow- and deep-layer soil moisture monitoring  

- Real-time alerts for drought, waterlogging-plant-damage, and anomalies  

- Solar power + built-in battery for long-term unattended operation  

- Expandable tilt, hydraulic conductivity, and other parameters  

- Widely used in agriculture, water conservancy, meteorology, forestry, and engineering monitoring 

The station is highly integrated, waterproof, anti-corrosion, and easy to install — foundational equipment for modern smart farmland, ecological monitoring, and water resource scheduling.

 FAQ 

1. Are soil moisture sensors affected by fertilizers and salinity?  

   No. NiuBoL sensors use FDR dielectric technology (non-contact measurement) and are unaffected by salinity, fertilizer concentration, or irrigation frequency. 

2. How long can the equipment be buried? Does it require maintenance?  

   With full IP68 sealing, it can be buried for many years. Generally, only a stability check every six months is needed; no routine maintenance required. 

3. How many layers does the multi-layer tube support?  

   Up to 10 customizable layers, meeting comprehensive analysis needs from surface to over 1 meter depth. 

4. How to view data? Is wiring required?  

   Supports RS485 or 4G/5G/WiFi wireless transmission. With wireless modules, only power connection is needed — no long-distance wiring. 

5. Can it be used in sandy, clay, or loamy soils?  

   Yes. Dielectric measurement technology works with all soil types and automatically compensates for conductivity differences. 

6. Will it affect plant roots?  

   No. No current is applied to roots; completely safe and environmentally friendly. 

7. Is on-site calibration required?  

   No. Factory calibrated; just install at required depths. 

8. What is the purpose of tilt monitoring?  

   Used for geological hazard warning on dams, slopes, farmland subsidence, reservoir banks, etc., by detecting ground movement. 

9. Is an additional protective box needed outdoors?  

   The sensor itself does not require one. The controller can be placed in a waterproof box as needed. 

10. Can it be linked with automatic irrigation systems?  

    Yes. It can automatically control valves based on set soil moisture thresholds, achieving fully automated precision irrigation. 

 Conclusion: NiuBoL Makes Soil Data Visible, Controllable, and Manageable 

Soil moisture is a core parameter for agricultural production and a critical basis for water resource scheduling, ecological monitoring, and disaster prevention. With dielectric constant technology, waterproof and anti-corrosion design, powerful multi-layer profile monitoring capabilities, and RS485/4G cloud connectivity, NiuBoL provides a stable, reliable, and scalable monitoring solution for global agriculture and water management.

 Whether for agricultural irrigation, drought monitoring, or engineering geological safety, the NiuBoL Soil Moisture Monitoring System delivers accurate, real-time, and scientific data support — making modern agriculture more water-efficient and intelligent, and water resource utilization more efficient and sustainable.

Soil moisture sensor datasheet:

1.NBL-S-THR Soil Temperature Moisture Sensor datasheet

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

2. NBL-S-TMC Soil Temperature Moisture EC Sensor datasheet

NBL-S-TMC-Soil-temperature-and-moisture-conductivity-sensor.pdf

3. NBL-S-TM Soil Temperature Moisture Sensor datasheet

NBL-S-TM-Soil-temperature-and-moisture-sensor-Instruction-Manual-4.0.pdf

4. NBL-S-TMCS Soil Temperature, Moisture, Conductivity and Salinity Integrated Sensor

NBL-S-TMCS-Soil-Temperature-Humidity-Conductivity-and-Salinity-Sensor.pdf

NBL-S-TMSMS-Tubular-Multi-depth-Soil-Moisture-Sensor-Instruction-Manual.pdf