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Industrial pH Sensor MODBUS-RTU RS485 & 0-2V Analog Voltage

  • $269.00
  • Save $20
  • (Exc. GST)

  • Available in stock

  • $ We Ship from our stock in AU (Perth) with pickup option, and Prices are Exc. GST
  • $ We Offer Quantity Discounts for Large Orders 10+ qty (Request for Quote)
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    Industrial pH Sensor MODBUS-RTU RS485 & 0-2V Analog Voltage

    This industrial-grade MODBUS-RTU RS485 pH meter/sensor features ATC, low-power consumption, high integration. It can be widely used in monitoring pH levels in soil and water applications such as agriculture, gardening, horticulture, swimming pools, scientific experiments, and other environmental monitoring scenarios. Comes with a waterproof aviation connector, it's convenient to use without the fuss of wiring.


    • High performance: high accuracy, fast response, good repeatability
    • Universal protocol: MODBUS RS-485
    • Wide-range power supply: 3.6V ~ 30V
    • Robustness: suitable to be immersed in soil or water for a long time
    • Maintainance-Free: advanced junction design, no clogging
    • Durable: anti-corrosion, automatic temperature compensation
    • User-friendly: Easy to install and integrate

    A pH meter measures the hydrogen-ion activity in water-based solutions, indicating its acidity or basicity expressed as pH. (Wikipedia: pH Meter). pH level is an important indicator in many scenarios, especially in monitoring soil conditions and water quality. A pH sensor is widely used in farming, gardening, hydroponics, aquaponics, swimming pools and spas, sewage treatment, education, environmental monitoring, and many other applications.

    This pH sensor (S-pH-01B) is designed with industry standards and equipped with a waterproof aviation connector. It adopts international advanced solid dielectric and large-area polytetrafluoroethylene liquid junction, which is not easy to block and convenient for maintenance. It's designed with ATC (automatic temperature compensation), making sure the data is accurate regardless of the temperature changes. This pH Sensor is IP65 rated, waterproof in a tight seal, capable of withstanding long-term constant use in professional application scenarios.
    This pH Sensor comes with a MODBUS-RTU RS485 serial communications protocol output. It can be easily connected to and integrated with other devices such as data-loggers, controllers, and displays, etc. This cost-effective pH sensor features low-power consumption, compact size, portability, high integration, making it widely applicable in both indoor and outdoor environments.


    Range 0 ~ 14pH
    Accuracy ± 0.1 pH
    Resolution 0.01 pH
    General Parameters
    Product Model S-pH-01A
    Output Interface Analog Voltage 0-2V (Output resistance ~0ohm) RS-485 MODBUS-RTU
    Power Supply 3.9-30V/DC 3.9-30V/DC
    Power Consumption 35mA@24V DC 35mA@24V DC
    Start-up time  < 2 seconds
    pH Measurement
    High impedance and isolated input;
    Range: 0 - 14PH,
    Resolution: 0.01PH,
    Accuracy: +/- 0.1PH;
    Can be used for a solution or semi-solid substrate
    Temperature Measurement
    Range: - 40~80°C,
    Resolution: 0.1°C,
    Accuracy: +/-0.5°C
    IP Rating

    Electrode: IP68;

    Transmitter: IP65

    Operating Temperature -40℃ ~ 85℃

    Electrode: 3/4"NPT screw threads;

    Transmitter: Mounting hole

    Cable Length
    Power and Signal Cable:2 meters (Customizable)
    Electrode Cable: 5 meters
    Electrode: Width*Diameter 160*30mm; 3/4"NPT screw threads
    Transmitter: 140mm*65mm*50mm


    • Agriculture: greenhouse, aquaponics, hydroponics, and crop Plantation, etc.
    • Animal Husbandry: pasture, grassland, and meadow
    • Forestry and Horticulture
    • Sewage Treatment
    • Swimming Pools and Spas
    • Scientific Experiments
    • Educational Projects
    • Other environmental monitoring scenarios 


    Wiring Diagram

    Please refer to the user manual for more details about the wiring diagram. 

    Probe Dimensions



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