- Multi-parameter Water Analyzer
- Single-Parameter Water Aalyzer
- DO Sensor
- Trace DO Sensor
- CO₂ Sensor
- COD Sensor
- EC TDS Sensor
- Salinity EC TDS Sensor
- TSS Sensor
- Turbidity Sensor
- PH Sensor
- ORP
- Ion Selective Sensor
- Ammonia Nitrogen Sensor
- Oil in Water Sensor
- Blue-Green Algae Sensor
- Chlorophyll Sensor
- Residual Chlorine Sensor
- Marine Current Sensor
0102030405
High-Precision RS485 EC/TDS Sensor for Wastewater Treatment - China Suppliers & Factory
Product Parameters
| Product Name | Two-Electrode Conductivity Sensor / TDS Sensor |
| Range | CT: 0–9999 µS/cm; 0–100 mS/cm TDS: 0–10000 ppm |
| Accuracy | 2.5% FS |
| Power | 9–24 VDC (Recommended: 12 VDC) |
| Material | Polymer Plastic |
| Size | 31 mm × 140 mm |
| Working Temperature | 0–50 °C |
| Cable Length | 5 m, extendable per user requirements |
| Sensor Interface | RS-485, MODBUS Protocol |
| IP Rating | IP68 |
Product Features
① High Stability & Anti-Interference
Isolated power supply design and corrosion-resistant graphite electrode ensure stable performance in high-ionic or electrically noisy environments.
② Wide Measurement Range
Covers conductivity from 10 µS/cm to 100 mS/cm and TDS up to 10000 ppm, suitable for diverse applications from ultrapure water to industrial wastewater.
③ Built-In Temperature Compensation
Integrated NTC sensor provides real-time temperature correction, enhancing measurement accuracy across varying conditions.
④ Single-Point Calibration
Simplifies maintenance with a single calibration point, achieving 2.5% accuracy across the full range.
⑤ Robust Construction
Polymer housing and G3/4 threaded design resist chemical corrosion and mechanical stress, ensuring longevity in submerged or high-pressure installations.
⑥ Seamless Integration
RS-485 output with Modbus protocol enables easy connectivity to SCADA, PLCs, and IoT platforms for real-time data monitoring.
Application
1. Industrial Wastewater Treatment
Monitors conductivity and TDS in effluent streams to optimize desalination, chemical dosing, and compliance with discharge regulations.
2. Aquaculture Management
Tracks water salinity and dissolved solids to maintain optimal conditions for aquatic life, preventing over-mineralization.
3. Environmental Monitoring
Deployed in rivers and lakes to assess water purity and detect contamination events, supported by the sensor's corrosion-resistant design.
4. Boiler / Cooling Systems
Ensures water quality in industrial cooling circuits by detecting scaling or ionic imbalances, reducing equipment corrosion risks.
5. Hydroponics & Agriculture
Measures nutrient solution conductivity to optimize fertilization and irrigation efficiency in precision farming.
Digital RS485 Water Quality Sensors Technical Data
| Parameter | Model | Range | Accuracy |
| DO Sensor | LMS-DO10B | 0–20 mg/L, 0–60 °C | ±0.1–0.3 mg/L |
| DO Sensor | LMS-DO10C | 0–20 mg/L, 0–60 °C | ±0.3 mg/L |
| Trace DO Sensor | LMS-TDO100 | 0–2000 ppb, 0–50 °C | ±1 ppb |
| PH Sensor | LMS-PH100 | 0–14 pH | ±0.02 pH |
| ORP Sensor | LMS-ORP100 | ±1000.0 mV | ±0.2 mV |
| EC/TDS Sensor | LMS-TDS102 | CT: 0–9999 µS/cm; 0–100 mS/cm TDS: 0–10000 ppm |
±2.5% FS |
| Salinity/EC/TDS Sensor | LMS-SAL104 | Conductivity: 0.1–500 mS/cm TDS: 0–60000 ppm Salinity: 0–500.00 ppt |
±1.5% FS |
| COD Sensor | LMS-COD100 | COD: 0.1–1500 mg/L TOC: 0.1–750 mg/L BOD: 0.1–900 mg/L Turbidity: 0.1–4000 NTU Temperature: 0–50 °C |
±5% equiv. KHP Temperature: ±0.5 °C |
| TSS Sensor | LMS-TSS100 | 0–50000 mg/L / 0–120000 mg/L | ±10% FS or 10 mg/L |
| Turbidity Sensor | LMS-TUR10L | 0–100 NTU | ±10% FS or 0.3 NTU |
| Turbidity Sensor | LMS-TUR10H | 0–3000 NTU | ±10% FS or 0.3 NTU |
| CO₂ Sensor | LMS-CO2100 | 2000 PPM / 10000 PPM / 50000 PPM | ±5% FS |
| Ammonia Nitrogen Sensor | LMS-NH4100 | 0–1000 mg/L | ±5% FS |
| Ion Selective Sensor | LMS-ION100 | 0–1000 mg/L | ±5% FS |
| Oil in Water Sensor | LMS-OIL100 | 0–50 mg/L; 0–5 mg/L | ±3% FS |
| Chlorophyll Sensor | LMS-CHL100 | 0–500 µg/L | ±3% FS |
| Blue-Green Algae Sensor | LMS-BGA100 | 0–2,000,000 cells/ml | ±3% FS |
| Residual Chlorine Sensor | LMS-HCLO100 | 0–20.00 ppm | ±5% FS |
| Marine Current Sensor | LMS-Current100 | Temperature: -3 °C – 45 °C Velocity: 0–500 cm/s Direction: 0–359.9° |
±0.05 °C ±1 cm/s or ±2% ±2° |
Frequently Asked Questions (FAQ)
Q
What is the measurement range of the LMS-TDS102 EC/TDS sensor?
The LMS-TDS102 supports a conductivity range of 0–9999 µS/cm and 0–100 mS/cm, with a TDS range of 0–10000 ppm. This wide range makes it suitable for applications from ultrapure water monitoring to industrial wastewater treatment.
Q
Is this conductivity sensor suitable for outdoor or submerged installations?
Yes. The sensor carries an IP68 rating, meaning it is fully protected against continuous water immersion. Its polymer housing and G3/4 threaded design also provide strong resistance to chemical corrosion and mechanical stress, making it ideal for long-term submerged or outdoor deployments.
Q
How does the built-in temperature compensation work?
The sensor integrates an NTC (Negative Temperature Coefficient) thermistor that continuously measures the water temperature. This data is used internally to automatically correct conductivity readings, ensuring accurate results even when water temperature fluctuates during operation.
Q
Can the sensor be integrated with SCADA systems or PLCs?
Absolutely. The sensor outputs data via RS-485 using the Modbus RTU protocol, which is widely supported by SCADA systems, PLCs, data loggers, and IoT gateways. This enables seamless real-time data acquisition and remote monitoring without additional signal converters in most cases.
Q
How do I calibrate the Two-Electrode Conductivity Sensor?
The sensor supports single-point calibration, which simplifies the maintenance process significantly. By calibrating at one reference point using a standard conductivity solution, the sensor achieves ±2.5% FS accuracy across its entire measurement range, reducing downtime and operational complexity.
Q
What power supply does the sensor require, and can the cable be extended?
The sensor operates on a 9–24 VDC power supply, with 12 VDC recommended for optimal performance. The standard cable length is 5 meters, but it can be extended according to user requirements, providing flexibility for installations in larger tanks, reservoirs, or remote field locations.