NPK Sensor rs485

🔹 NPK Soil Sensor – RS485 Modbus, Soil Nitrogen Phosphorus Potassium Detector

This NPK soil sensor is a professional agricultural measurement device designed for real-time monitoring of soil nutrients. It measures Nitrogen (N), Phosphorus (P), and Potassium (K) levels, along with soil temperature and moisture in some models. Featuring an RS485 interface with Modbus protocol, it enables long-distance communication and integration with IoT systems, data loggers, PLCs, and microcontrollers like Arduino or ESP32.

✅ Specifications:

• Measurement Parameters: Soil Nitrogen (N), Phosphorus (P), Potassium (K)

• Additional Measurements (model dependent): Soil Temperature, Soil Moisture, Electrical Conductivity (EC)

• Interface: RS485

• Communication Protocol: Modbus RTU

• Power Supply: 5V – 30V DC (typical 12V DC)

• Power Consumption: <0.5W

• Probe Length: 50mm – 70mm (typical)

• Cable Length: 1m – 5m (varies by model)

• Housing Material: Stainless steel probe, waterproof epoxy-sealed body

• Protection Rating: IP68 (waterproof for direct burial)

• Operating Temperature: -40°C to +80°C

• Response Time: <1 second

📦 Measurement Ranges & Accuracy (Typical):

ParameterRangeAccuracyNitrogen (N)0 – 1999 mg/kg±5%Phosphorus (P)0 – 1999 mg/kg±5%Potassium (K)0 – 1999 mg/kg±5%Temperature-40°C to +80°C±0.5°CMoisture0 – 100%±3%(Specifications may vary by manufacturer – verify with datasheet)

📦 Applications:
✔️ Precision agriculture and smart farming
✔️ Soil nutrient analysis and management
✔️ Greenhouse and hydroponic systems
✔️ Scientific research and agricultural studies
✔️ IoT-based environmental monitoring
✔️ Automated irrigation and fertilization systems
✔️ Golf course and lawn management
✔️ Forestry and ecological research

🔧 Wiring:

• Red / Brown: VCC (12V typical)

• Black / Green: GND

• Yellow / White: RS485 A (+)

• Blue / Green: RS485 B (-)

🔧 Modbus Configuration (Typical):

• Baud Rate: 9600 (configurable)

• Data Bits: 8

• Stop Bits: 1

• Parity: None

• Device Address: 1 (configurable)

⚠️ Important Notes:

• RS485 interface requires a converter (e.g., MAX485, RS485 to USB, RS485 to TTL) for use with Arduino, ESP32, or Raspberry Pi.

• Calibration: Factory calibrated; periodic cleaning recommended for accurate readings.

• Installation: Insert probe fully into soil, avoid air gaps, and ensure good soil contact.

• Power supply: Ensure stable DC power within specified range.