News Details

Introducing the KNF-315FDR 3-in-1 Soil Moisture, Conductivity & Temperature Sensor

We are pleased to announce the release of the KNF-315FDR, a high-sensitivity, high-precision 3-in-1 soil sensor that measures Volumetric Water Content (VWC), Electrical Conductivity (EC), and soil temperature through a single rugged probe. Engineered for researchers, growers, and system integrators working with saline soils and modern precision agriculture, this sensor delivers stable, laboratory-grade readings directly in the field.

By measuring the dielectric constant of the soil, the sensor accurately reflects the real moisture content of a wide range of soil types, fully complying with current international standards for volumetric water content. Its FDR (Frequency Domain Reflectometry) measurement technology ensures fast response, excellent repeatability, and long-term stability — even in the most demanding environments.

Key Features

• True 3-in-1 measurement: integrated soil moisture (VWC), conductivity (EC), and temperature in one device.
• IP68 waterproof: fully sealed construction that can be completely submerged in water or buried for long periods.
• Anti-corrosion & durability: electrodes made from specially treated alloy resist strong impacts, acid, and alkali.
• High precision: fast response with excellent interchangeability thanks to a convenient plug-in design.
• Low power consumption: standby current below 600μA at 5V in low-power mode, ideal for battery-powered field stations.
• Flexible output: RS485 (Modbus Protocol) / SDI-12, easily integrated into data loggers and IoT platforms.

Technical Indicators

Applications

The KNF-315FDR is designed for a broad spectrum of agricultural, environmental, and industrial scenarios:

• Soil moisture monitoring and scientific experiments
• Water-saving irrigation, greenhouses, floriculture, and vegetable production
• Grassland, pastures, and plant cultivation
• Sewage treatment and precision agriculture
• Saline soil research, occurrence, evolution, and reclamation studies
• Water-salt dynamics analysis and nutrient solution / substrate measurement

Easy to Deploy

Installation is straightforward and non-destructive. For quick measurements, select a location free of stones, insert the sensor vertically into the soil without shaking, and average multiple readings for the most reliable result. For long-term monitoring, dig a vertical pit of more than 30 cm in diameter, insert the steel needle horizontally into the pit wall at the target depth, backfill tightly, and allow the soil to settle before beginning continuous measurement — suitable for days, months, or even longer deployments.

Ready for Global Projects

With a flexible MOQ of just 1 piece, a supply ability of 300+ pieces per month, and a delivery time of 10–20 working days, the KNF-315FDR is ready to support pilot studies and large-scale rollouts alike. Brand Kainafu, manufactured in Shenzhen, China, and supplied with T/T payment terms.

Contact us today to request a sample, technical datasheet, or a tailored quotation for your precision agriculture project.