DFRobot
RS485 Soil Temperature, Moisture, and EC Sensor for Precision Irrigation and Climate Control in Greenhouses (IP68, 5-30V)
· MPN: SEN0601
The RS485 Soil Sensor provides real-time monitoring of soil temperature, moisture, and electrical conductivity (EC) in a single rugged probe. It communicates...
The RS485 Soil Sensor provides real-time monitoring of soil temperature, moisture, and electrical conductivity (EC) in a single rugged probe. It communicates via the MODBUS-RTU protocol over RS485, making it easy to integrate with Arduino, Raspberry Pi, and automated irrigation or climate control systems.
The probe is constructed from 316 stainless steel and sealed with flame-retardant epoxy resin to IP68 standards, allowing long-term burial in soil or submersion in water. Built-in automatic temperature compensation ensures accurate EC readings regardless of environmental changes.
Key Features
- Three-in-One Sensing – Measures soil temperature, moisture, and electrical conductivity simultaneously
- RS485 MODBUS-RTU Output – Compatible with Arduino (via TTL-to-RS485 adapter), Raspberry Pi, PLCs, and data loggers
- Wide Voltage Range – Operates on 5–30 V DC power supply
- IP68 Rated – Vacuum-filled and sealed with black flame-retardant epoxy resin for long-term burial
- 316 Stainless Steel Probe – Rust-proof, waterproof, and resistant to corrosion and electrolysis
- Automatic Temperature Compensation – Ensures accurate EC measurements across 0–50°C range
- Compact Design – 123 × 45 × 15 mm with 2 m cable length
Specifications
- Power Supply – DC 5–30 V (0.7 W @ 24 V)
- Output – RS485 (MODBUS-RTU)
- Moisture Range – 0–100% (resolution: 0.1%, accuracy: ±2% at 0–50%, ±3% at 50–100%)
- Temperature Range – −40°C to +80°C (resolution: 0.1°C, accuracy: ±0.5°C)
- EC Range – 0–20,000 µS/cm (resolution: 1 µS/cm, accuracy: ±3% FS up to 10,000 µS/cm, ±5% FS above)
- Working Temperature – −40°C to +60°C
- Protection – IP68
- Cable Length – 2 m
- Dimensions – 123 × 45 × 15 mm
Ideal For
- Precision agriculture and smart farming
- Greenhouse climate and irrigation management
- Environmental and soil research
- Grassland and pasture monitoring
- Grain storage moisture monitoring
Package Contents
- 1× RS485 Soil Sensor (temperature, humidity, and EC)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- Electrical conductivity (EC)
- A measure of how easily water conducts electricity, usually related to the amount of dissolved salts or minerals in it. EC matters for water quality projects because it helps indicate contamination, salinity, or nutrient levels, but it does not identify the specific substances present.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs, and automation devices. Modbus support matters because it can make the controller easier to integrate with existing industrial equipment.
- ModBus-RTU
- ModBus-RTU is a common industrial protocol for sending sensor readings and control commands over serial links such as RS485. Knowing the sensor uses ModBus-RTU helps you choose software libraries, data loggers, or controllers that can request and interpret its readings.
- RS485
- RS485 is a robust wired serial communication standard often used in factories, farms, and buildings where cables may be long or electrically noisy. It matters because it lets this controller connect to industrial sensors, meters, and control equipment over longer distances than typical hobby serial wiring.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
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Supplier page — dfrobot.com
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