Conductivity / TDS / Salinity Sensor
Conductivity / TDS / Salinity Sensor
TL-EC Series
4-electrode inductive conductivity sensor. Range 0–200 mS/cm, IP68, RS485 Modbus RTU output.
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The TL-EC Series measures electrical conductivity, TDS, and salinity using a 4-electrode inductive measurement principle. Suitable for high-conductivity industrial water, seawater, and process fluids. Automatic temperature compensation ensures stable readings across varying conditions.
Working Principle
Electrochemical sensors measure ion activity or electrical properties of the liquid. A reference electrode and measuring electrode create a potential difference proportional to the ion concentration (pH/ORP), or an AC excitation signal is applied across electrodes to measure conductivity. Built-in NTC temperature compensation corrects readings across the full operating temperature range. RS485 Modbus RTU output transmits calibrated values directly to PLCs and SCADA systems.
Wiring & Signal Output
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement Principle | 4-electrode inductive |
| Conductivity Range | 0–200 mS/cm |
| TDS Range | 0–100 g/L |
| Salinity Range | 0–70 PSU |
| Accuracy | ±1% FS |
| Temperature Range | 0–80°C |
| Pressure | 0–6 Bar |
| Signal Output | RS485 Modbus RTU / 4-20mA |
| Power Supply | 12–24 VDC |
| Protection | IP68 |
| Material | SS316L |
Key Features
- 4-electrode inductive principle — no direct contact with fluid
- Simultaneous TDS and salinity calculation
- Automatic temperature compensation
- Suitable for high-conductivity and corrosive fluids
Typical Applications
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