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7-in-1 RS485 MODBUS Water Quality Monitor 220V

7-in-1 RS485 MODBUS Water Quality Monitor 220V

$138.75 USD
$158.75 USD $138.75 USD
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7-in-1 RS485 220V Digital Water Quality Tester

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PH-3178 7-in-1 Multi-function

This PH-3178 7-in-1 Water Quality Tester has pH (0.01-14.00), EC (conductivity) (0.00-20.00 mS/cm), TDS (Total Dissolved Solids) (0-9999 ppm), CF (Concentration Factor) (0.1-199.9 CF), ORP (Oxidation Reduction Potential) (±1200mV), Temperature (0.1°C-80.0°C), HEPA (HEPA) (0.1°C-80.0°C), HEPA (HEPA) (0.1°C-80.0°C). 80.0°C), Humidity all in one.

Online Real-time Online Water Quality Monitor + RS485 Communication

  1. supports RS485 MODBUS communication protocol, which can be connected to PLC system or host computer remote platform.
  2. Data can be transferred to PC via USB interface module, USB stick module is required.
  3. Suitable for European 220V plug, industrial/laboratory use.

European Standard 220V to be equipped with USB stick

If you buy the version with Bluetooth or USB function, you need to:

  • Plug the 485 cable into the instrument and the module;
  • Connect the USB port of the computer through the module;
  • Note that the voltage must be 6V regulated to ensure the safety of power supply.

Multi-functional professional water quality inspection

The PH-3178 7-in-1 Water Quality Tester is a professional-grade, real-time online monitoring system designed for aquariums, hydroponics, wastewater management, and industrial water treatment. With RS485 MODBUS communication and 220V EU plug, it ensures accurate, continuous, and integrated water quality management.

  1. 7-in-1 Multi-Parameter Monitoring which monitors pH, ORP, EC, TDS, CF, temperature, and humidity all in one device.
  2. RS485 MODBUS Communication
    Seamlessly connects to PLC, data acquisition software, or SCADA systems via industrial-grade MODBUS RTU protocol.
  3. USB Connectivity via Adapter Module
    Convert RS485 to USB and plug directly into your PC for configuration or data logging.
  4. High Precision Electrodes
    Replaceable electrodes with factory-calibrated EC values ensure long-term stability and accuracy.
    Real-Time Display
    Large backlit LCD displays all measurements clearly. Temperature switching between °C/°F supported.
  5. Automatic Calibration
    Supports multi-point calibration for pH (4.00, 6.86, 9.18), EC (1413µS/cm), and ORP (256mV), with digital adjustment.
  6. Waterproof and Durable
    IP65-rated casing and probe cable (1.2m) allow for robust use in humid and semi-submersible environments.

  • Real-Time ORP Monitoring for Critical Water Environments

    Accurately monitor Oxidation-Reduction Potential (ORP) from -1200mV to +1200mV with clear readings for drinking water, aquaculture, and swimming pools. Ensure safe, stable, and optimized water quality at a glance.

    Standard ORP Reference Values:

    +150–550mV
    +300–450mV
    ≥ +650mV

  • Optimize Nutrient Solutions for Soilless Cultivation

    Accurately monitor CF, EC, pH, temperature, and humidity in real-time to maintain optimal conditions for hydroponic growth. Each crop needs a precise nutrient formula—this device helps you get it right.

    CF Range: 0.1–199.9 CF

    Nutrient concentration control is key to maximizing yield and root health in water-based systems.

  • Maintain a Healthy Aquarium with Accurate pH Monitoring


    Measure pH (0.01–14.00), EC, and Temperature in real-time to create the ideal aquatic environment. Keep your fish and plants thriving with precision control over water quality parameters.

  • Seamless RS485 to USB Data Integration

    Easily connect the 7-in-1 water quality meter to your PC for real-time monitoring and data logging. The RS485 to USB module ensures stable MODBUS communication for industrial and laboratory applications.

    Perfect for:

    • Long-term data acquisition
    • PLC or SCADA system integration
    • Remote monitoring & control

Application Scenarios

The PH-3178 7-in-1 Water Quality Tester is a professional-grade, real-time online monitoring system designed for aquariums, hydroponics, wastewater management, and industrial water treatment. With RS485 MODBUS communication and 220V EU plug, it ensures accurate, continuous, and integrated water quality management

Button label

How to Use

1. Preparation

  • Remove the electrode cap.
  • Remove the electrode cap.

2. Power On

  • Connect to power (220V adapter or RS485 module).
  • Press ON/OFF to start.

3. Measurement

  • Insert the probe into water (tank,
  • nutrient solution, aquarium, etc.).
    4. Select Parameters
  • Left screen: EC / TDS / CF
  • Middle screen: pH / ORP
  • Right screen: Temperature / Humidity

5. Read Values

  • Wait until readings stabilize.
  • View real-time, high-accuracy data.

6. Calibration (Optional)

  • Use standard buffers: pH 4.00 / 6.86 / 9.18, EC 1413μS/cm, ORP 256mV
  • Press and hold CAL to enter calibration.
  • Adjust with ▲ / ▼ until correc

7. Shutdown

  • Press ON/OFF to turn off.
  • Rinse the electrode, replace cap.

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