7-in-1 Soil NPK ( Nitrogen (N) Phosphorus (P), Potassium (K), Soil Moisture, Temperature, pH & EC) Sensor MODBUS-RTU RS485. (IP68, 5-30V)

Comprehensive 7-in-1 Root-Zone Diagnostics

This high-precision multi-parameter soil sensor provides real-time, simultaneous monitoring of essential agronomic indicators: Nitrogen (N), Phosphorus (P), Potassium (K), Soil Temperature, Volumetric Water Content (Soil Moisture), Electrical Conductivity (EC), and pH. Engineered for advanced agronomy, precision farming, and environmental research, this integrated probe delivers accurate sub-surface metrics in under one second. By capturing macronutrient concentrations alongside critical physicochemical soil properties, growers and researchers can optimize automated fertigation schedules, fine-tune macronutrient application rates, and prevent crop stress resulting from salt buildup or nutrient lockout.

Industrial Hardening and Vacuum-Epoxy Potting

Constructed to endure permanent direct burial in hostile subsurface environments, the sensor housing is fully encapsulated in black, flame-retardant epoxy resin via a high-vacuum potting process. This construction eliminates internal air voids, preventing moisture condensation and structural failure under soil compaction. The sensing prongs are fabricated from premium 316L stainless steel and anti-corrosion specialized alloys, delivering resistance against acidic soils, high salinity, aggressive fertilizer compounds, and long-term electrolytic erosion. Featuring an IP68 ingress protection rating, the probe remains completely impervious to liquid immersion and hydrostatic pressure variations.

RS485 Modbus-RTU Protocol and Wide-Voltage Power Circuitry

Featuring an industrial-grade RS485 communication interface supporting standard Modbus-RTU protocol, this probe integrates directly into programmable logic controllers (PLCs), remote terminal units (RTUs), wireless IoT gateways, and environmental data loggers. The internal power management stage accommodates input voltages from 5V to 30V DC with active reverse-polarity and transient voltage suppression (TVS) protection. Consuming less than 0.5W at 24V DC, the sensor is optimized for continuous operation in remote, solar-powered environmental monitoring stations and off-grid wireless telemetry nodes.

High-Precision Sensing Physics and Automatic Temperature Compensation

Soil moisture is determined using High-Frequency Frequency Domain Reflectometry (FDR), yielding accurate volumetric water content readings unaffected by minor soil density shifts. Electrical conductivity is measured via alternating current conductivity cells to prevent electrode polarization. Internal hardware implements Automatic Temperature Compensation (ATC) across 0 to 50 degrees Celsius, neutralizing thermal drift to ensure stable EC and pH measurements across varying ambient temperatures and seasonal soil profiles.

Deployment Scenarios and Precision Agriculture Integration

This multi-parameter probe is suited for commercial greenhouse production, smart drip-irrigation networks, vertical farming installations, soil science research, forestry management, and large-scale open-field crop monitoring. Whether installed vertically in root-zone strata or deployed horizontally across multi-depth profile arrays, the sensor supplies actionable telemetry to maximize crop yields, streamline resource allocation, and minimize environmental fertilizer runoff.