Soil NPK-pH-EC-Temperature-Moisture 7 in 1 Sensor
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The 7-in-1 Integrated Soil Nutrient Sensor is a high-performance, multifunctional soil analysis device that delivers comprehensive monitoring of seven vital soil parameters: moisture, temperature, electrical conductivity (EC), nitrogen (N), phosphorus (P), potassium (K), and pH. Designed for precision agriculture and soil diagnostics, this sensor uses RS485 Modbus-RTU communication, making it compatible with PLCs, microcontrollers, and industrial monitoring systems.
Built with five 316L stainless steel probes and vacuum-potted epoxy sealing, the sensor ensures long-term durability in harsh soil environments. With IP68 protection, it's completely waterproof, corrosion-resistant, and capable of continuous submersion in field conditions. It offers automatic temperature compensation and rapid response for real-time data collection. Whether optimizing irrigation, managing fertilizers, or monitoring soil recovery, this sensor is essential for agriculture professionals, researchers, and greenhouse operators.
Application:
• Agricultural Irrigation Systems
• Soil Testing & Environmental Monitoring
• Greenhouse & Nursery Cultivation
• Precision Fertilization Planning
• Land Reclamation & Ecosystem Analysis
Key Features:
• Monitors 7 critical soil parameters in real-time: N, P, K, pH, EC, temperature, moisture
• Supports RS485 Modbus-RTU communication for easy integration
• IP68-rated waterproof and corrosion-resistant body
• 316L stainless steel probes resist long-term electrolysis and salt/alkali corrosion
• Vacuum-potted epoxy body for full waterproof sealing
• High accuracy and fast response (<1s) across all measured parameters
• Suitable for long-term outdoor use in agricultural fields, greenhouses, and research applications
Specifications:
| Parameter | Specification |
|---|---|
| Power Supply | 5V–24V DC (wide voltage input) |
| Power Consumption | 0.5W (at 24V), 0.15W (at 12V) |
| Output Signal | RS485 Modbus-RTU |
| Baud Rate | 4800 / 9600 (default depends on device) |
| Moisture Range | 0–100% RH |
| Moisture Accuracy | ±2% (0–50%), ±3% (50–100%) |
| Temperature Range | -40°C to 80°C |
| Temperature Accuracy | ±0.5°C |
| EC Range | 0–20000 μS/cm |
| EC Accuracy | ±2%, Resolution: 10 μS/cm |
| pH Range | 3–9 pH |
| pH Accuracy | ±0.3 pH |
| NPK Range | 0–2999 mg/kg (or mg/L) |
| NPK Accuracy | ±2%, Resolution: 1 mg/kg |
| Response Time | < 1 second |
| Protection Level | IP68, Fully Waterproof & Dustproof |
| Probe Material | 316L Stainless Steel |
| Working Temperature | -40°C to 80°C |
| Installation Depth | Full burial possible (recommended: vertical) |
Wiring (Cable Color):
-
Wire Color & Function (Typical RS485 4-wire Soil Sensor)
From multiple 7-in-1 RS485 soil sensors (similar to yours), this is the standard wiring:
Wire Color
Connection
Notes
Red
VCC / Power +
+5 V up to +24 V DC (wide range)
Black
GND / Power –
Connect to system ground
Yellow
RS-485 A (or B+)
One differential line of Modbus-RTU
Green
RS-485 B (or A–)
The other differential line
RS-485 is a differential communication standard — both yellow and green must go to an RS-485 transceiver (e.g., MAX485) before interfacing with a microcontroller.
Package Includes:
1 x 7-in-1 Soil Sensor (Moisture, Temperature, EC, NPK, pH)
1 x Pre-wired RS485 communication cable