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Temperature & Humidity Sensor

RS485 4-in-1 Soil Moisture, Temperature, pH & EC Sensor

SKU: SEN0604

This RS485 soil sensor measures temperature, humidity, EC, and pH. It has a 5-30V wide voltage supply, fast response, stable output, and automatic conductivity temperature compensation. With IP68 protection, 316 stainless steel probe (rust/corrosion-resistant), it’s small, long-burial, and suitable for all soil types. Compatible with Arduino UNO R3 + TTL-to-485 board, widely used in agriculture (irrigation, greenhouses), rapid testing, etc.

Overview of MODBUS-RTU RS485 4-in-1 Soil Moisture, Temperature, pH & EC Sensor

Downloadable Resources

  • Docs
  • Tech Specs

    • Specification

    Parameter Details
    Power supply voltage DC5-30V
    Power consumption 0.5W@24V
    Output mode RS485
    Detection parameters temperature, humidity，conductivity (EC)、PH
    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
    Conductivity (EC)
    Measuring range 0-20000us/cm
    Resolution 1us/cm
    Accuracy 0-10000us/cm@±3%FS, 10000-20000us/cm@±5%FS
    Temperature compensation memory temperature compensation, compensation range 0-50°C
    Measuring range 0-50°C
    PH
    Measuring range 3-9PH
    Resolution 0.1PH
    Protection level IP68
    Probe material anti-corrosion special electrode
    Sealing material black flame retardant epoxy resin
    Working temperature -20°C~+60°C
    Size 127x45x15mm
    Cable length 2m

    Dimensional Drawing

    Dimensional Drawing

    Pinout

    Num Label Description
    Brown line VCC Power input positive pole, DC5-30V power supply
    Black line GND Power ground wire
    Yellow line 485-A RS485 data line A
    Blue line 485-B RS485 data line B

    FAQ

    • Possible reasons for no output or output errors?
      - The computer has a COM port, but the selected port is incorrect.
      - TTL to 485 module operation/programming toggle switch selection is incorrect.
      - Wrong baud rate.
      - The 485 bus is disconnected, or the A and B lines are connected reversely.
      - If there are too many devices or the wiring is too long, power supply should be provided nearby.
      - Equipment damage.

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