In thermal power plants, precise online sodium monitoring is essential to maintain the safety and efficiency of water-steam systems. An online sodium analyzer enables continuous detection of trace sodium ions (Na⁺) in feedwater, steam, and condensate.
However, one of the most common challenges operators face is:
measurement drift leading to unstable readings.
A low drift sodium analyzer is not just an upgrade — it is a critical requirement for ensuring long-term measurement reliability and operational safety.
According to industry standards such as GB/T 12145-2016, sodium limits in power plant systems are extremely strict:
- Feedwater sodium: ≤ 3 μg/L
- Steam sodium: ≤ 5 μg/L
At such ultra-low concentrations, even minimal drift in a sodium ion analyzer can result in significant measurement errors.
- False high readings → unnecessary blowdown and excessive chemical dosing
- False low readings → undetected contamination risks
Potential consequences include:
- Turbine blade scaling
- Superheater fouling
- Corrosion and tube failure
Therefore, low drift performance is the #1 selection criterion for any online sodium analyzer used in power plants.
A high-quality online sodium analyzer for water treatment should include the following core technologies:
- Minimizes electrode aging effects
- Ensures long-term stability for trace sodium detection
- Maintains accuracy across 5–45°C
- Reduces environmental influence on measurements
- Dual independent calibration channels
- Prevents cross-contamination of standard solutions
- Maintains optimal pH (>10.5)
- Enhances electrode response stability
- Eliminates signal noise
- Ensures stable and reliable output
The ERUN-SZ3-M6 online sodium analyzer is specifically designed for high-precision sodium monitoring in demanding industrial environments.
✔ Independent Dual Calibration System
Prevents cross-contamination and improves calibration accuracy
✔ Automatic Background Sodium Compensation
Eliminates trace sodium interference in standard solutions
✔ Real-Time pH-Controlled Alkalization
Ensures stable measurement conditions
✔ Drain-Type Measurement Chamber
Prevents residual sample interference and improves response time
✔ Multi-Parameter Monitoring (Na⁺, pH, Conductivity)
Supports cross-verification and rapid fault diagnosis
Parameter | Value |
Measurement Range | 0–100 μg/L / 0–10 mg/L (Auto Switching) |
Resolution | 0.01 μg/L |
Accuracy | ±0.05 pNa or ±0.5 μg/L |
Drift Stability | ≤ 0.02 pNa / 24h |
Repeatability | ≤ ±1% F.S |
Temperature Range | 5–45°C |
This online sodium ion analyzer is widely used in:
- Thermal power plant
- Combined cycle power plants
- Boiler water monitoring systems
- Condensate and feedwater analysis
- Industrial water treatment systems
When selecting a sodium analyzer supplier, consider the following factors:
- Low drift performance (primary priority)
- Long calibration intervals
- Stable electrode system
- Intelligent automation capabilities
- Proven industrial application experience
A low drift sodium analyzer ensures:
- Accurate and stable data
- Reduced maintenance and calibration costs
- Enhanced plant safety and reliability
In trace sodium monitoring, accuracy without stability is meaningless.
Choosing a low drift online sodium analyzer such as the ERUN-SZ3-M6 delivers:
- Reliable long-term performance
- Lower operational risks
- Improved protection for critical equipment
