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Products Description
Nexisense TH-406-S Online Total Hardness Sensor Product Definition
The Nexisense TH-406-S Online Total Hardness Sensor is a device specifically designed for water quality monitoring, primarily used to measure the concentration of calcium and magnesium ions in water, thereby calculating the total hardness of water (measured as CaCO3). This sensor is suitable for various water quality environments and can provide real-time, accurate water quality data to assist users in effective water quality management.
Working Principle
The Nexisense TH-406-S sensor utilizes selective electrode technology based on a PVC membrane calcium and magnesium ion selective electrode, capable of measuring under different water quality conditions. The sensor is equipped with an automatic temperature compensation function, utilizing a Pt1000 temperature sensor to ensure measurement accuracy across varying temperatures. It outputs data via an RS-485 bus, supporting Modbus/RTU protocol, making it convenient to connect with PLCs, DCS, and other industrial control systems.
Structural Analysis
The structure of the Nexisense TH-406-S sensor is designed with ease of installation and long-term stability in mind. Its main components include:
Shell Material: Made of POM and 316L stainless steel, offering strong corrosion resistance suitable for various harsh environments.
Electrode System: Built-in calcium and magnesium ion selective electrode with a longer lifespan and high stability.
Installation Interface: Features a 3/4 NPT pipe thread design for easy installation in pipes and tanks.
Measurement Method
The Nexisense TH-406-S measures the concentration of calcium and magnesium ions in water through contact with the electrode, utilizing electrochemical principles. The measurement results are displayed in mg/L, with a resolution of 0.1 mg/L. The measurement range is 0-1000 mg/L, with an accuracy of ±10% of the reading and ±0.3°C.
Nexisense TH-406-S Online Total Hardness Sensor Technical Parameters
| Parameter | Specification |
|---|---|
| Model | Nexisense TH-406-S |
| Measurement Range | 0-1000.0 mg/L |
| Resolution | 0.1 mg/L |
| Accuracy | ±10% of reading; ±0.3°C |
| Storage Temperature | -5 to 40°C |
| Operating Conditions | 0 to 40°C, < 0.2MPa |
| pH Range | 4 to 10 pH |
| Temperature Compensation | Automatic Temperature Compensation (Pt1000) |
| Power Supply | 12 to 24VDC |
| Signal Output | RS-485 (Modbus/RTU), 4-20mA (Optional) |
| Shell Material | POM and 316L Stainless Steel |
| Installation Mode | 3/4 NPT Pipe Thread, Immersion Mount |
| Cable Length | 5 meters, other lengths can be customized |
| Calibration Method | Two-point calibration |
Nexisense TH-406-S Online Total Hardness Sensor Maintenance and Calibration
To ensure the long-term stability and accuracy of the Nexisense TH-406-S sensor, regular maintenance and calibration are recommended. Users should follow these steps:
Regular Inspection: Periodically check the appearance and connections of the sensor to ensure there is no damage or looseness.
Electrode Cleaning: Clean the electrode using appropriate cleaning agents to avoid contamination.
Calibration: Perform two-point calibration according to the instructions in the user manual to ensure measurement accuracy.
Conclusion
The Nexisense TH-406-S Online Total Hardness Sensor is a high-performance water quality detection device that, through its advanced selective electrode technology and stable temperature compensation function, provides users with accurate water quality data. Whether in industrial water treatment, environmental monitoring, or laboratory applications, the Nexisense TH-406-S is an ideal choice. With its convenient installation and reliable output signals, users can easily integrate it into existing water quality monitoring systems for efficient water quality management.
