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Soil Moisture, Temperature, EC & pH Sensor Modbus-RTU RS485 – IP68, 2 image

Soil Moisture, Temperature, EC & pH Sensor Modbus-RTU RS485 – IP68, 3 image

Soil Moisture, Temperature, EC & pH Sensor Modbus-RTU RS485 – IP68

SKU:

25-00016990

Part Number: SEN0604

CompanyDFRobot Part NumberSEN0604

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Description
Specifications

The 4-in-1 soil sensor is designed to monitor key soil parameters: temperature, humidity, electrical conductivity (EC), and pH. With its wide voltage power supply range of 5-30V and RS485 data transmission using the reliable MODBUS-RTU protocol, this sensor delivers rapid, accurate, and stable readings, enabling optimal irrigation scheduling and precise soil management. It is compatible with the Arduino UNO and TTL to RS485 expansion board for easy setup. It is suitable for a variety of agricultural, horticultural, and environmental applications, including greenhouse farming, large-scale irrigation systems, and scientific research. For most soil monitoring projects, this 4-in-1 sensor provides all the necessary data in one device, eliminating the need for multiple individual sensors.

The soil sensor boasts an IP68 protection level, vacuum-filled and sealed with black flame-retardant epoxy resin. The probe, crafted from 316 stainless steel, offers rust-proof, waterproof, anti-corrosion, salt-alkali corrosion resistance, and long-term electrolysis resistance properties. Its performance is influenced by the soil salt content. Compact in size, it can be buried in the soil for extended periods and is compatible with various soil types.

The soil sensor features an automatic temperature compensation function for conductivity, ensuring measurement accuracy regardless of environmental changes. Its applications span across agricultural irrigation, greenhouses, floriculture and vegetable farming, grassland pastures, rapid soil testing, plant cultivation, scientific experiments, grain storage, and the measurement of moisture content and temperature of various particulate matter.

Soil temperature and moisture directly influence plant growth and nutrient absorption. Soil electrical conductivity (EC) represents soil salinity, a crucial indicator of soil fertility and health. High soil salt content hinders water absorption by plants. Soil pH, or “soil reaction”, is an acid-base reaction of the soil solution, dependent on the concentration of hydrogen ions. It’s expressed by the pH value, with 7 being neutral, less than 7 acidic, and greater than 7 alkaline. Soil pH can generally be divided into the following levels:

Soil acidity and alkalinity, pH values:

<4.5 Extremely acidic
4.5–5.5 Strongly acidic
5.5–6.5 Acidic
6.5–7.5 Neutral
7.5–8.5 Alkaline
8.5–9.5 Strongly alkaline
>9.5 Extremely alkaline

Technical data

Power supply voltage: DC 5V–30V
Power consumption: 0.5W@24V
Output mode: RS485
Detection parameters: Temperature, Humidity, Electrical Conductivity (EC), pH
Protection level: IP68
Probe material: anti-corrosion special electrode
Sealing material: black flame retardant epoxy resin
Working temperature: -20°C – +60°C
Cable length: 2m
Size: 123×45×15mm
Humidity parameters
- Measuring range: 0–100%
- Resolution: 0.1%
- Accuracy: 0–50%@±2%, 50–100%@±3%
Temperature parameters
- Measuring range: -40°C – +80°C
- Resolution: 0.1°C
- Accuracy: ±0.5°C
EC parameters
- Measuring range: 0-20000μs/cm
- Resolution: 1μs/cm
- Accuracy: 0–10000μs/cm@±3%FS, 10000–20000μs/cm@±5%FS
- Temperature compensation: memory temperature compensation, compensation range 0–50°C
pH parameters
- Measuring range: 3pH – 9pH
- Resolution: 0.1pH

Key features

5V–30V wide voltage power supply
RS485 output, can be used with Arduino
With automatic temperature compensation, high precision, fast response and stable output
Stainless steel probe can be buried in soil or water for a long time
Resin vacuum filling and sealing, IP68 protection level