High-Precision Sodium Monitoring for Power and Water Systems

The Endress+Hauser CA76NA is an online sodium analyzer developed for applications where extremely low sodium concentrations need to be monitored continuously.

In power plants, sodium contamination in high-purity water systems can indicate problems such as condenser leakage, insufficient water treatment or ion exchanger malfunction. Early detection helps prevent corrosion, deposits and damage to expensive equipment.

The CA76NA is mainly used for:

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  Boiler feedwater monitoring
  
• 
  Steam cycle monitoring
  
• 
  Condensate quality control
  
• 
  Ion exchanger performance monitoring
  
• 
  Desalination plant water quality monitoring
  

Potentiometric Ion-Selective Measurement Principle

The CA76NA uses a potentiometric measurement principle with an ion-selective sodium electrode.

The analyzer measures sodium ion concentration in the sample water and provides continuous online monitoring of water purity.

Benefits include:

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  High sensitivity for trace sodium measurement
  
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  Reliable monitoring of high-purity water
  
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  Fast detection of contamination events
  
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  Stable long-term operation
  

The system also uses a separate pH electrode for optimized pH adjustment and accurate temperature compensation.

Protect Critical Power Plant Equipment

Water quality directly affects the reliability and lifetime of turbines, boilers and steam systems.

The CA76NA helps operators identify:

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  Condenser leaks
  
• 
  Sodium carryover
  
• 
  Ion exchanger degradation
  
• 
  Water treatment issues
  

By providing continuous sodium measurement, operators can respond quickly before impurities cause serious equipment problems.

Typical applications include:

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  Thermal power plants
  
• 
  Combined cycle power plants
  
• 
  Utility water systems
  
• 
  High-purity water treatment facilities
  

Multi-Channel Monitoring Capability

The CA76NA can be configured with multiple sample channels, allowing one analyzer to monitor different measuring points within the same facility.

Advantages include:

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  Monitoring multiple water circuits with one analyzer
  
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  Reduced installation costs
  
• 
  Flexible measurement intervals
  
• 
  Centralized water quality management
  

This makes it suitable for large power generation facilities requiring monitoring at multiple critical points.

Low Reagent Consumption and Reduced Maintenance

The analyzer is designed for efficient operation with optimized consumption of reagents and standard solutions.

Benefits include:

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  Reduced operating costs
  
• 
  Lower maintenance requirements
  
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  Simplified routine operation
  
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  Reliable long-term monitoring
  

The system supports preventive maintenance strategies by providing continuous water quality information.

Reliable Online Water Quality Analysis

Compared with laboratory sampling, online sodium monitoring provides continuous process visibility.

The CA76NA helps users:

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  Detect changes in water quality immediately
  
• 
  Reduce manual sampling frequency
  
• 
  Improve process safety
  
• 
  Optimize maintenance planning
  

It is especially valuable in applications where even small sodium variations can indicate potential process problems.

Key Features

• 
  High-precision online sodium analyzer
  
• 
  Potentiometric / ion-selective electrode measurement principle
  
• 
  Designed for boiler feedwater, steam, condensate and ion exchanger monitoring
  
• 
  Measuring range from 0.1 to 9999 µg/l (ppb) Na
  
• 
  Separate pH electrode for accurate compensation and pH adjustment
  
• 
  Supports up to six sample channels
  
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  Continuous online monitoring capability
  
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  Low reagent consumption
  
• 
  Suitable for power plants and utility applications
  
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  0/4 to 20 mA output communication
  

Typical Applications

Power Plants

The CA76NA is widely used in water-steam cycle monitoring.

Applications:

• 
  Boiler feedwater analysis
  
• 
  Steam purity monitoring
  
• 
  Condensate monitoring
  
• 
  Turbine protection
  

Condenser Leakage Detection

Sodium concentration changes can indicate contamination entering the steam cycle.

Applications:

• 
  Condenser outlet monitoring
  
• 
  Early warning systems
  
• 
  Equipment protection
  

Ion Exchange Systems

The analyzer supports monitoring of demineralization and water purification processes.

Applications:

• 
  Ion exchanger performance monitoring
  
• 
  Purified water quality control
  
• 
  Regeneration process verification
  

Desalination and High-Purity Water Systems

Applications:

• 
  Desalinated water quality monitoring
  
• 
  High-purity process water control
  
• 
  Utility water management
  

FAQ

What is Endress+Hauser CA76NA?

Endress+Hauser CA76NA is an online sodium analyzer designed for continuous monitoring of sodium concentration in high-purity water systems, especially boiler feedwater, steam and condensate applications.

What does CA76NA measure?

CA76NA measures sodium ions (Na⁺) in water with a measurement range of 0.1 to 9999 µg/l (ppb) Na.

What measurement principle does CA76NA use?

The analyzer uses a potentiometric measurement principle based on an ion-selective sodium electrode.

Where is CA76NA mainly used?

It is mainly used in power plants, steam-water cycle monitoring, condensate systems and ion exchange applications.

Why is sodium monitoring important in power plants?

Low-level sodium contamination can indicate water quality problems such as condenser leaks or ion exchanger failures. Early detection helps protect boilers, turbines and other critical equipment.