ambient or trending analysers

Difference between trending or reference analyzers

Choosing between trending and reference analyzers for ambient air analysis depends on your specific needs, goals, and the level of accuracy required for your applications. Let’s explore the pros and cons of both types of analyzers:


  1. Cost-Effective: Trending analyzers are generally less expensive than reference analyzers, making them a more budget-friendly option for initial setup.
  2. Real-Time Monitoring: Trending analyzers provide real-time data, allowing you to monitor air quality continuously and make immediate decisions if pollution levels exceed acceptable limits.
  3. Suitable for General Monitoring: Trending analyzers are suitable for general air quality monitoring purposes, where precise accuracy is not a critical requirement.
  4. Ease of Use: These analyzers are often easier to install, operate, and maintain, which can be beneficial if you have limited technical expertise.


  1. Limited Accuracy: Trending analyzers may not provide the same level of accuracy as reference analyzers. If high accuracy is essential for regulatory compliance or research purposes, trending analyzers might fall short.
  2. Less Detailed Data: These analyzers may provide less detailed data, which could limit your ability to analyze pollutant sources or trends with high granularity.

Reference Analyzers:


  1. High Accuracy: Reference analyzers are designed to provide the highest level of accuracy and precision. They are essential for regulatory compliance, research, and applications where precise pollutant measurements are critical.
  2. Detailed Data: Reference analyzers offer more detailed data, enabling you to identify specific pollutants and their concentrations accurately.
  3. Quality Assurance: These analyzers often undergo rigorous calibration and quality assurance procedures to ensure accurate and reliable measurements.
  4. Research and Compliance: Reference analyzers are indispensable for scientific research, air quality modeling, and regulatory compliance, where accurate data is essential.


  1. Higher Cost: Reference analyzers are generally more expensive to purchase, operate, and maintain. Initial setup costs and ongoing calibration efforts can be significant.
  2. Complex Maintenance: These analyzers require more technical expertise for installation, operation, and maintenance. Regular calibration and quality control are necessary to maintain accuracy.
  3. Limited Real-Time Monitoring: Reference analyzers may not provide real-time data, and their measurements might need to be averaged over specific time intervals.

Choosing Between the Two:

The choice between trending and reference analyzers depends on factors such as your budget, the specific objectives of your air quality monitoring program, regulatory requirements, and the level of accuracy needed. If you require highly accurate and detailed data for research, compliance, or modeling purposes, reference analyzers are the preferred option despite their higher costs and technical demands. On the other hand, if you are primarily interested in general air quality monitoring, real-time data, and have budget constraints, trending analyzers could be a suitable choice.

Before making a decision, it’s essential to consult with air quality experts, such as AAVOS International, and manufacturers to ensure that your chosen analyzer aligns with your goals and meets the necessary standards for accuracy and reliability.