Product Introduction
Explosion-proof conductivity sensor for conductivity detection sensing probe in harsh chemical environments
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.
Explosion-proof conductivity sensor for conductivity detection sensing probe in harsh chemical environments
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
Explosion-proof conductivity sensor for conductivity detection sensing probe in harsh chemical environments
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.
Explosion-proof conductivity sensor for conductivity detection sensing probe in harsh chemical environments
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
- Industrial Wastewater Treatment — Monitor conductivity and TDS in effluent to ensure compliance with discharge standards and optimize treatment processes.
- Chemical Processing — Used in harsh chemical environments to measure conductivity of acids, alkalis, and salt solutions, ensuring process control and safety.
- Water Quality Monitoring — Ideal for environmental monitoring stations and water treatment plants to track conductivity, salinity, and temperature in surface water and groundwater.
- Aquaculture — Helps maintain optimal water quality in fish farms by monitoring salinity and conductivity, crucial for species health.
Keywords：explosion-proof conductivity sensor, digital conductivity sensor, RS485 Modbus conductivity sensor, water quality sensor, TDS sensor, salinity sensor, industrial conductivity probe, AMT-DDL300
