8-in-1 Soil Sensor for Versatile Growing
This 8-in-1 soil detector measures humidity, temperature, EC, salinity, pH, and NPK—ideal for any farm or garden.
8 in 1 RS485 Soil Sensor with Modbus RTU
Description
An RS485 soil sensor outputs readings over Modbus RTU, so a controller or datalogger reads the soil directly instead of a person reading a screen.
Eight channels: nitrogen, phosphorus, potassium, pH, electrical conductivity, moisture, salinity and soil temperature.
This is not a standalone handheld meter. It requires an external DC power supply, an RS485 connection and a compatible Modbus RTU master device.
On data quality: pH, EC, moisture and temperature are sensor readings, and accuracy is affected by installation depth, soil contact, moisture distribution and soil composition. The nitrogen, phosphorus and potassium channels are derived from conductivity rather than measured chemically, which makes them suitable for trend logging rather than as absolute nutrient values.
For register maps, wiring details, volume requirements or lead times, contact us directly.
Specs
- Measurement Items: N, P, K, pH, EC, Moisture, Temperature, Salinity
- Output Signal: RS485 (Standard Modbus RTU)
- Power Supply: 12-24V DC
- Waterproof Rating: IP68 (Dustproof & Waterproof)
- Probe Material: 316L Stainless Steel
- Working Range: -30°C to 70°C
- Cable Length: 2 Meters (Customizable)
- Accuracy: Temperature ±0.2°C; Moisture ±2%
Applications
Smart Greenhouses & Hydroponics
Precision Field Agriculture
Orchard & Nursery Management
Scientific Soil Research & Environmental Monitoring
Shipping & Returns
Shipping Policy
- Orders are processed within 1-2 business days (excluding weekends and holidays).
- Free shipping is available for the United States, select European countries, and various Asian regions, with a delivery timeframe of 7-20 business days.
- Duties and taxes are not included and will be collected by the carrier at delivery.
- Upon shipment, you’ll receive a tracking number via email for real-time updates.
Return Policy
- We offer a 7-day return policy, starting from the day you receive your item.
- Items must be unused, in their original condition with tags and packaging, and accompanied by proof of purchase.
Shipping Costs for Returns:
- Quality Issues: We cover the return shipping costs.
- Personal Reasons: Customers cover the return shipping costs.
Non-Returnable Items:
- Used or worn products.
- Sale/discounted/promotional items.
- Gift cards.
Refund Process:
- Refunds will be processed through your original payment method within 5-8 business days after approval.
Frequently Bought Together
8 in 1 RS485 Soil Sensor with Modbus RTU
Flexible System Integration for Soil Sensors
Our RS485 sensor connects to your PC (485-to-USB), microcontroller, or PLC via Modbus RTU.
Cloud-Powered Remote Soil Monitoring
Upload soil data to our free cloud platform via a network collector (8 elements) or environmental host (32 elements). Access real-time insights on any device to track optimal growth.
FAQ
Can you support volume orders?
Contact us to discuss volume requirements and lead times.
Can I get the register map?
Contact our team to ask about the register map.
What do I need to read it?
A compatible Modbus RTU master, an RS485 connection and an external DC power supply.
How accurate are the Nitrogen, Phosphorus, and Potassium (NPK) readings?
The sensor uses the FDR (Frequency Domain Reflectometry) principle to estimate NPK levels based on the soil's dielectric constant and conductivity. While it provides highly reliable trends and relative changes for smart farming, for laboratory-grade absolute precision, we recommend using it alongside periodic professional soil soil tests to calibrate your local baseline.
Can I leave the sensor buried in the soil for a long time?
Yes, absolutely. The sensor is rated IP68 waterproof and vacuum-sealed with high-density epoxy resin. The probes are made of 316L stainless steel, which is specially treated to resist long-term salt-alkali corrosion and electrolysis.
Does this sensor work with my existing PLC or Arduino system?
Yes. The sensor communicates via the standard RS485 Modbus RTU protocol, which is the industry standard. It can easily connect to PLCs (like Siemens or Mitsubishi), microcontrollers (Arduino, Raspberry Pi, ESP32), or industrial computers using an RS485-to-USB adapter. One RS485 bus can theoretically support up to 254 sensors.
Why is the pH or NPK reading not changing immediately after insertion?
For accurate readings, the soil must be moist and in full contact with the probes. After insertion, it typically takes 3 to 5 minutes for the sensor to stabilize as the soil settles around the probes. We recommend ensuring the soil moisture is at least 20% for the most accurate chemical parameter readings (pH/EC/NPK).
What is the power requirement and cable limit?
The sensor operates on a wide voltage range of 12V to 24V DC. The standard cable is 2 meters.