1. Product Overview
The INK310 is a high‑precision digital four‑electrode conductivity, salinity, and TDS sensor designed for continuous online monitoring in industrial water treatment, environmental monitoring, and marine applications. Using advanced four‑electrode technology, it delivers better accuracy, wider measuring range, and higher long‑term stability than traditional two‑electrode sensors. It integrates a temperature sensor and automatic temperature compensation (ATC) to ensure reliable readings under varying temperatures. Equipped with an RS‑485 interface and MODBUS protocol, it supports easy integration with industrial control systems and outputs conductivity, salinity, TDS, and temperature simultaneously for comprehensive water quality assessment.
2. Sensing Technology & Self-Cleaning System
Sensing Technology
The INK310 uses four‑electrode conductivity measurement: two outer electrodes provide a stable AC excitation current, and two inner electrodes measure the voltage drop across the solution. This structure eliminates polarization errors found in two‑electrode sensors, ensuring high precision even in high‑conductivity and high‑salinity environments.
An internal temperature sensor enables automatic temperature compensation (ATC), normalizing readings to a 25°C reference to maintain accuracy across 0–50°C. Digital data is transmitted via RS‑485 and MODBUS RTU, supporting long‑distance, stable communication, remote calibration, and configuration.
Self-Cleaning System
The product does not include a built‑in self‑cleaning system (mechanical, ultrasonic, or chemical). External cleaning or regular maintenance is required in heavily fouled environments.
3. Key Features & Competitive Advantages
Key Features
- Advanced four‑electrode sensing, anti‑polarization, high stability
- Simultaneous measurement: conductivity, salinity, TDS, temperature
- IP68 waterproof, corrosion‑resistant housing
- RS‑485 + MODBUS RTU for industrial communication
- Automatic temperature compensation (ATC)
- One‑point / two‑point calibration
- Low power consumption (0.2W), 9–24V DC supply
- Compact size, customizable cable length
- Auto‑ranging conductivity measurement
Competitive Advantages
- Technical superiority: Four‑electrode design outperforms two‑electrode sensors in range, accuracy, and anti‑pollution performance
- Multi‑parameter integration: Reduces system cost and installation complexity
- Industrial‑grade reliability: IP68, submersible, suitable for harsh environments
- Digital native design: Easy integration with PLC, SCADA, remote monitoring systems
- Low power: Ideal for outdoor, solar‑powered monitoring stations
- Flexible calibration and installation: Adaptable to diverse working conditions
4. Technical Specifications
| Parameter |
Specification |
| Model |
INK310 |
| Measuring Principle |
Four‑electrode technology |
| Conductivity Range |
0–200 mS/cm (auto‑ranging) |
| Conductivity Accuracy |
±1% or ±0.01 mS/cm (whichever is greater) |
| Salinity Range |
0–175 ppt |
| Salinity Accuracy |
±1 ppt |
| TDS Range |
0–128000 mg/L |
| Temperature Range |
0–50°C |
| Protection Rating |
IP68 |
| Communication |
RS‑485, MODBUS RTU |
| Power Supply |
DC 9–24V, >500mA |
| Power Consumption |
0.2W |
| Dimensions |
Φ22 mm × 175.5 mm |
| Standard Cable |
10 meters (customizable) |
| Calibration |
One‑point / two‑point calibration |
| Housing Material |
Ni + PEEK + Ti |
5. Application
- Industrial wastewater treatment & RO systems
- Seawater desalination & brine discharge monitoring
- Aquaculture & fisheries water quality control
- Power plant boiler / cooling water monitoring
- Environmental surface water, coastal & groundwater monitoring
- Food & beverage processing & CIP systems
- Marine & offshore engineering seawater monitoring
- Mining & mineral processing water monitoring
