The online conductivity sensor is designed specifically for drinking water, circulating aquaculture water, and various water supply systems, integrating conductivity and TDS measurement. It uses RS-485 Modbus RTU communication and can quickly interface with third-party platforms such as PLC, DCS, and industrial control screens, providing reliable data support for intelligent water quality monitoring.
Core Advantage:
1. Accurate measurement, temperature compensation and protection
The measurement range is 0-5000 μ S/cm (TDS 0-3000 mg/L), with an accuracy of ± 1.5% of the reading and a temperature error of ± 0.3 ℃. Built in Pt1000 automatic temperature compensation, response time T90<30 seconds, detection limit as low as 2 μ S/cm, ensuring stable output under different water quality conditions.
2. Flexible installation, sturdy and durable
Adopting 3/4 NPT pipe thread, supporting water tank immersion, pipeline or tank installation, with a minimum inclination of 15 ° to meet the requirements. The shell is made of ABS/PC alloy, with a protection level of IP68, and can work in an environment of 0-50 ℃ and ≤ 0.2MPa for a long time. Standard 5-meter four core shielded wire, supporting 12-24V DC wide voltage power supply, with a power consumption of only 0.25W.
3. Quality commitment, comprehensive service
Before leaving the factory, it undergoes a 72 hour aging test and comes with a one-year warranty. Provides two-point calibration (zero point+slope), supports Modbus register address/baud rate modification, comes with complete accessories and operation manual, and provides timely after-sales response.
| Model | ZW-EC-PR | |
| Shell material | ABS/PC alloy | |
| Principle | electrode method | |
| Range and Resolution |
0~5000 μS/cm (TDS 0-3000 mg/L) |
1 |
| Accuracy | ± 1.5% of the reading,±0.3℃ | |
| Response Time (T90) | <30s | |
| Limit of Detection (LOD) | 2uS/cm(depending on the range of vision) | |
| Calibration method | two-point calibration | |
| Cleaning method | / | |
| Temperature compensation | automatic temperature compensation(Pt1000) | |
| Output method | RS-485(Modbus RTU) | |
| Storage temperature | -5~65℃ | |
| Working Conditions | 0~50℃,≤0.2MPa | |
| Installation method | immersion installation,3/4 NPT | |
| power consumption | 0.25W@12V | |
| power supply | 12~24V DC | |
| Protection level | IP68 | |
| Cable length | 5 meters, other lengths available | |




Industrial-Grade & Stable Data Transmission: RS485 delivers robust anti-interference performance for real-time, reliable hardness data transmission in harsh environments (e.g., industrial boilers, municipal water supply), ensuring accurate monitoring.
Easy Integration & Scalability:Supports multi-node networking, seamlessly integrates with mainstream PLC/RTU systems, enabling flexible deployment and reducing system integration costs and maintenance complexity.

1.Are you manufacture?
A:Yes,we are Tranmitter manufacturer and exporter in China with more than 10 years of CE,ROHS,FCC,ISO and 11 patents experience.
2.Do you offer OEM services?
A:Yes,we can provide you with OEM services and design housings and logos.
3.DO you offer free samples?
A:Sorry,we don't offer free samples.After ordering in bulk,we will deduct the sample fee from the second order.