Product Introduction
Water Quality Conductivity Sensor Circulation Water Sewage Environment Conductivity Transmitter Source Factory
1. Working Principle
Based on the ionic conductivity characteristics of solutions, divided into two categories:
- Contact electrode type (two-electrode / four-electrode)
- Two-electrode: suitable for pure water, low conductivity water bodies; high concentration is prone to polarization and pollution.
- Four-electrode (mainstream smart type): eliminates polarization effects, anti-pollution, wide range, suitable for sewage, high-salinity seawater, most commonly used in industrial online applications.
- Electromagnetic induction type (electrodeless): coil induction measurement, suitable for strongly corrosive high-salinity wastewater, cannot measure ultrapure water.
Built-in NTC/PT1000 temperature sensor, automatic temperature compensation, automatic conversion to 25℃ standard conductivity, simultaneously outputs EC, TDS, salinity, temperature multi-parameters.
Water Quality Conductivity Sensor Circulation Water Sewage Environment Conductivity Transmitter Source Factory
2. Core features
✅ Built-in calculation in probe, no transmitter needed, plug-and-play, reducing system costs ✅ RS485 Modbus RTUas the mainstream interface; some also carry 4 20mA Analog output ✅ Automatic temperature compensation ATC，25℃conversion; factory pre-calibrated, one-key calibration on site ✅ Protection rating mostly IP68, can be installed submerged for long periods ✅ Strong anti-interference, supports long-distance wiring, suitable for IoT and remote monitoring ✅ Power-off saves calibration parameters, parameters will not be lost
Water Quality Conductivity Sensor Circulation Water Sewage Environment Conductivity Transmitter Source Factory
3. Technical parameters (industrial four-electrode type)
Table
| Item |
Typical indicators |
| Measurement range |
0~200 mS/cm (can be segmented: pure water μS level, sewage mS level) |
| Accuracy |
±1%~±2%FS |
| Temperature |
0-50℃, automatic temperature compensation |
| Power supply |
DC 9 24V |
| Output |
RS485 Modbus RTU; optional 4-20mA |
| Protection |
IP68, pressure resistance up to 6-10bar |
| Material |
PEEK electrode sheath, resistant to acid and alkali corrosion |
Key selection points:Electrode constant K value：K=0.01 for ultrapure water; K=1 for tap water and surface water; K=10 for sewage and high-salinity wastewater.
Water Quality Conductivity Sensor Circulation Water Sewage Environment Conductivity Transmitter Source Factory
4. Main application scenarios
- Environmental monitoring: surface water, rivers, reservoirs, seawater, municipal wastewater online monitoring
- Water treatment: pure water / Ultrapure water, circulating water, reclaimed water reuse, water treatment plants
- Industry: chemical, pharmaceutical, power plant boiler water process water quality monitoring
- Aquaculture: seawater aquaculture salinity, aquaculture water bodies EC Monitoring
- Smart agriculture: hydroponic nutrient solution EC Detection
Main Application Areas
- Water Treatment — Monitoring conductivity and TDS in reverse osmosis, demineralization, and wastewater treatment processes to ensure water quality standards.
- Environmental Monitoring — Continuous monitoring of natural water bodies such as rivers, lakes, and groundwater to detect pollution levels and salinity changes.
- Industrial Process Control — Real-time measurement of conductivity in cooling water, boiler feedwater, and chemical solutions to optimize process efficiency and prevent scaling or corrosion.
- Aquaculture — Maintaining optimal water quality in fish farms and hatcheries by monitoring conductivity and salinity to ensure healthy aquatic life.
Keywords：conductivity sensor, water quality sensor, RS485 conductivity sensor, Modbus RTU sensor, TDS sensor, salinity sensor, industrial conductivity transmitter, online water quality monitor
