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Agricultural Sensors
NiuBoL launches the brand new 7-in-1 Soil Sensor for Android - USB-C, utilizing advanced FDR frequency domain reflectometry principle and supporting direct Type-C connection to Android and HarmonyOS phones. One-tap measurement of seven key soil parameters: temperature, moisture, EC, salinity, and NPK. High-precision 316L stainless steel probes with IP68 waterproof rating, accompanied by a free APP supporting data export and GPS positioning. Suitable for greenhouses, irrigatio···
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The NiuBoL 7-in-1 Soil Sensor for Android USB-Type-C is a portable soil multi-parameter tester designed for rapid field measurement. It connects directly to a compatible Android or HarmonyOS smartphone through the Type-C interface, allowing the phone to provide power, display measurement data and manage test records.
One sensor measures seven soil parameters: temperature, moisture, electrical conductivity (EC), salinity, available nitrogen, available phosphorus and available potassium. The mobile APP supports real-time data display, parameter correction, historical records, curve charts and Excel export.
The portable design is suitable for greenhouse inspection, irrigation management, rapid soil testing, agricultural field surveys, plant cultivation and research applications where measurements need to be taken at multiple locations without installing a fixed monitoring system.
| Measurement Parameter | Range | Accuracy | Resolution |
|---|---|---|---|
| Soil Temperature | -40 to 80°C | ±0.3°C | 0.1°C |
| Soil Moisture | 0–100% (m³/m³) | ±2% | 0.1% |
| Soil EC | 0–20000 μS/cm | ±3% | 1 μS/cm |
| Soil Salinity | 0–20000 mg/L | ±3% | 1 mg/L |
| Available Nitrogen | 0–1999 mg/kg | ±3% output specification | 1 mg/kg |
| Available Phosphorus | 0–1999 mg/kg | ±3% output specification | 1 mg/kg |
| Available Potassium | 0–1999 mg/kg | ±3% output specification | 1 mg/kg |
NPK note: The N, P and K channels provide empirical theoretical values based on soil electrical conductivity and corresponding conversion coefficients. They are mainly suitable for rapid field comparison and trend monitoring rather than laboratory-equivalent nutrient analysis.
| Feature | Description |
|---|---|
| FDR Soil Moisture Measurement | Uses Frequency Domain Reflectometry to detect changes in soil dielectric properties and determine volumetric soil moisture. |
| 7 Parameters | Measures temperature, moisture, EC, salinity, nitrogen, phosphorus and potassium. |
| 316L Stainless Steel Probes | Provides corrosion resistance for soil measurement and repeated field use. |
| Epoxy Resin Sealing | The internal electronic circuit is sealed to improve moisture resistance. |
| IP68 Sensor Body | Suitable for soil measurement and humid agricultural environments. |
| USB Type-C | The smartphone provides power and data communication through the Type-C connection. |
| Portable Testing | No separate handheld display, data collector or external battery is required for normal mobile testing. |
| Parameter | What the Measurement Tells You | Important Consideration |
|---|---|---|
| Soil Temperature | Provides information about root-zone thermal conditions that affect germination, root activity and biological processes. | Interpret together with crop requirements and growth stage. |
| Soil Moisture | Indicates volumetric soil water content and can support irrigation scheduling and field comparison. | Good probe-to-soil contact is important for stable measurements. |
| Soil EC | Reflects the overall electrical conductivity associated with dissolved ions in the soil solution. | EC does not directly identify individual nutrients and is influenced by moisture, salts and fertilizer concentration. |
| Soil Salinity | Provides a salt-concentration reference value for comparing soil salt conditions between locations or over time. | Interpret trends together with irrigation water, fertilizer use and soil moisture. |
| Nitrogen | Provides an empirical field-reference value related to soil electrical characteristics. | Not a direct chemical measurement of actual soil nitrogen. |
| Phosphorus | Provides an empirical field-reference value for comparative monitoring. | Laboratory analysis is recommended when accurate nutrient concentration is required. |
| Potassium | Provides an empirical field-reference value useful for observing relative changes. | Should not be used alone for precise fertilizer formulation. |
The sensor connects directly to the smartphone charging port through USB Type-C. The phone provides power and data communication, making the system convenient for mobile field testing without a separate handheld terminal.
| System / Requirement | Compatibility |
|---|---|
| Android Smartphone | Supported on compatible USB Type-C devices with OTG function |
| HarmonyOS 4.3 and Below | Supported |
| HarmonyOS 5.0 and Above | Not supported |
| Apple iOS | Not supported |
| OTG | Required; some phones require OTG to be enabled manually in Settings |
| Real-Time Data Display | Displays the seven soil parameters directly on the smartphone. |
| Parameter Configuration | Supports available parameter configuration and correction functions. |
| Data Storage | Stores field measurement records for later review. |
| Historical Data | Allows previous records to be viewed and compared. |
| Curve Charts | Displays measurement changes as trend curves. |
| Excel Export | Exports stored data for reporting and further analysis. |
| Chinese / English | Supports language switching in the APP. |
| Software Update | The APP can check for available updates during startup. |
Download NiuBoL Portable Soil Sensor Android APP →
| Application | Typical Use |
|---|---|
| Water-Saving Irrigation | Compare soil moisture conditions between different field locations before or after irrigation. |
| Greenhouses | Perform rapid spot checks of soil moisture, temperature, EC and salinity in planting beds. |
| Flowers & Vegetables | Compare soil conditions between cultivation areas and different growth stages. |
| Grassland & Pasture | Carry out portable soil-condition surveys at multiple sampling locations. |
| Plant Cultivation | Monitor changes in root-zone water, temperature and salt conditions. |
| Scientific Experiments | Collect portable multi-parameter soil measurements for comparison and field records. |
| Environmental Monitoring | Support soil-condition surveys where rapid on-site measurements are required. |
| Rapid Soil Testing | Move between sampling locations without deploying a fixed sensor network. |
| Step | Action | Description |
|---|---|---|
| 1 | Install the APP | Install the NiuBoL portable soil sensor APP on a compatible smartphone. |
| 2 | Connect Type-C | Insert the sensor plug into the smartphone charging port. |
| 3 | Enable OTG | If the sensor does not respond, enable OTG manually in the phone settings. |
| 4 | Select the Sampling Point | Avoid rocks, large roots and abnormal wet or dry areas that are not representative. |
| 5 | Insert the Probe | Insert the sensing probes fully into the soil and maintain good contact with the surrounding soil. |
| 6 | Read and Save Data | View the data in the APP and save or export records when required. |
| Parameter | 7-in-1 | 8-in-1 |
|---|---|---|
| Temperature | Yes | Yes |
| Moisture | Yes | Yes |
| EC | Yes | Yes |
| Salinity | Yes | Yes |
| N / P / K | Yes | Yes |
| pH | No | Yes |
Choose the 7-in-1 version when portable measurement of temperature, moisture, EC, salinity and NPK is required. If soil pH measurement is also required, select the 8-in-1 Portable Soil Sensor.
A1. It measures soil temperature, moisture, EC, salinity, available nitrogen, available phosphorus and available potassium.
A2. No. Soil pH is not included in the 7-in-1 configuration. The 8-in-1 portable version adds a pH measurement channel.
A3. The smartphone should have a compatible USB Type-C interface and support OTG data communication. Compatibility should be confirmed before purchase for unusual phone models or operating-system versions.
A4. Check whether OTG is enabled in the smartphone settings, reconnect the Type-C plug and confirm that the NiuBoL APP is installed correctly.
A5. No. NPK readings are empirical theoretical values derived from soil electrical conductivity and conversion coefficients. They are mainly intended for rapid field comparison and trend monitoring.
A6. The readings should not be used as the sole basis for precise fertilizer formulation. Crop requirements, soil conditions and laboratory analysis should be considered when accurate nutrient management is required.
A7. This Type-C version is primarily designed for portable field testing. For unattended continuous monitoring, a fixed RS485 soil sensor connected to a data logger or IoT gateway is generally more suitable.
A8. Yes. The APP supports stored measurement records, historical data, curve viewing and Excel export.
📱 NiuBoL Soil Sensor App
Connect the NiuBoL Soil Sensor to your Android smartphone via USB-C and instantly view soil data on your mobile device.
Download the App:
7-in-1 Soil Sensor Portable Type-C/USB Soil Multi-Parameter Tester & Analyzer.pdf
The NiuBoL 7-in-1 Soil Sensor for Android USB-Type-C combines portable field measurement with smartphone-based data management. It is designed for users who need to move between multiple sampling points and quickly compare soil temperature, moisture, EC, salinity and NPK reference values.
For permanent monitoring projects, NiuBoL also provides RS485 soil sensors that can be integrated with PLCs, data loggers, LoRaWAN nodes, 4G gateways and private monitoring platforms.
The nitrogen (N), phosphorus (P), and potassium (K) values provided by this sensor are estimated reference values calculated from soil electrical characteristics using empirical algorithms. They are not obtained through direct chemical analysis and do not represent accurate measurements of actual soil nutrient concentrations.
NPK readings may be significantly affected by soil moisture, electrical conductivity, salinity, soil composition, and environmental conditions. The displayed values may differ substantially from laboratory test results.
NPK readings are provided for general field reference only.
Do not use NPK readings as the basis for fertilizer recommendations, fertilizer dosage calculations, crop selection, soil fertility assessment, or planting decisions.
For accurate soil nutrient analysis and professional agricultural management, soil samples should be tested by a qualified laboratory using appropriate chemical analysis methods.
NiuBoL does not guarantee that the estimated NPK values accurately represent actual soil nutrient concentrations or are suitable for fertilizer management and agricultural decision-making. Users are responsible for independently verifying soil nutrient conditions before making agricultural decisions. To the extent permitted by applicable law, NiuBoL shall not be liable for crop losses, incorrect fertilization, or other consequential losses resulting from reliance on these estimated values outside their intended use. This disclaimer does not affect applicable statutory rights.
Sensors & Weather Stations Catalog
Agriculture Sensors and Weather Stations Catalog-NiuBoL.pdf
Weather Stations Catalog-NiuBoL.pdf
Agriculture Sensors Catalog-NiuBoL.pdf
Water Quality Sensor Catalog-NiuBoL.pdf
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