Importance of Air Quality Gas Analyzers in Public Spaces for Epidemic Prevention

With the arrival of autumn and winter 2020, epidemic prevention experts warned that SARS-CoV-2 spreads more effectively in cold, dry environments, making indoor air management in public spaces a critical battlefield for prevention. Wearing masks, handwashing, and social distancing are essential at the individual level, but for malls, hospitals, schools, stations, offices, and theaters, effectively evaluating and improving indoor environments to reduce cross-infection risk has become a management challenge.

While air quality analyzers cannot directly detect viruses, they provide key parameters—especially PM2.5 (aerosol carrying capacity) and CO₂ (ventilation efficiency)—that indirectly quantify indoor transmission risk, offering objective, visual data for scientific decision-making in prevention.

Why Indoor Air Management Is Critical in Autumn and Winter

During the autumn-winter transition, lower temperatures and humidity prolong virus survival in the air. People tend to close windows and use heating, significantly reducing ventilation. Studies show that high CO₂ concentrations in enclosed spaces correlate strongly with increased viral transmission risk. WHO and other health agencies recommend adequate ventilation as a cost-effective and efficient non-pharmaceutical intervention.

CO₂ above 1000 ppm indicates insufficient fresh air and recirculation of exhaled air, increasing viral load. High PM2.5 levels act as virus carriers, extending suspension time and travel distance. Real-time monitoring of these indicators provides a “barometer” of indoor infection risk.

How Air Quality Monitoring Supports Epidemic Risk Management

• CO₂: Indicator of occupancy and ventilation efficiency.
  <800 ppm → good ventilation, low risk; 800–1200 ppm → attention, increase fresh air; 1500 ppm → high risk, improve ventilation, reduce occupancy, or temporarily close.

• PM2.5: Reflects aerosol density and air purification status.
  

  <35 reduced="">75 μg/m³ → enhanced virus transport capacity.

When thresholds are exceeded, systems can trigger visual or audible alarms, or link ventilation and purification equipment to increase air changes (ACH) and dilute potential viral load.

Comprehensive Monitoring for Daily Health Management

Beyond epidemic prevention, indoor air quality impacts general health. Nexisense analyzers can monitor multiple pollutants simultaneously:

• Formaldehyde (HCHO), TVOC

• Ammonia (NH₃), benzene compounds

• Radon (optional on some models)

• Temperature, humidity, oxygen

These parameters comply with GB/T 18883 and GB 50325. Long-term exposure to elevated formaldehyde or TVOC can irritate respiratory tracts and reduce immunity, creating favorable conditions for viral infection. Continuous monitoring reduces disease risk and improves employee and customer comfort and health.

Smart and Big Data Management in Public Spaces

Modern air quality monitoring is part of IoT systems. Nexisense analyzers support wired and wireless data transmission to cloud platforms. Managers can view real-time air quality trends via mobile apps, web, or large displays, with historical data, exceedance statistics, and area comparisons. For chains or large venues, unified big data platforms enable:

• Cross-area risk grading

• Quantified triggers for emergency response plans

• Evaluation of green building performance

• Public visualization of “healthy air commitment”

Linked with ventilation and purification systems, it enables “ventilation and purification on demand,” ensuring air quality and energy efficiency.

Advantages of Nexisense SGA-608 Multiparameter Analyzer

• Flexible combination of 1–6 gases (CO₂, HCHO, TVOC, NH₃, etc.) + PM2.5/PM10 + temperature/humidity, up to 10 parameters;

• Built-in vacuum pump for fast response, suitable for quick assessment;

• HD touchscreen displaying instant, minute/hour averages, max/min, curves, and tables;

• High-capacity battery for portable use or 24h continuous operation;

• Intelligent calibration with patented correction algorithm;

• Dual USB + wired/wireless transmission;

• Optional: telescopic pole, high-temperature probe, air pre-treatment device.

Suitable for fixed installation or mobile inspection, providing fast and accurate multi-dimensional air quality profiling.

Deployment Recommendations and Linkage Strategies

• Monitoring points: waiting halls, classrooms, restaurants, gyms, lobbies, underground parking, or enclosed areas with high occupancy.

• Linkage logic: CO₂ >1000 ppm or PM2.5 >50 μg/m³ → increase ventilation; severe exceedance → activate air purifiers and send alerts.

• Visualization: display real-time AQI and health advice on large screens to build public trust.

  
  

Frequently Asked Questions (FAQ)

1. Can the analyzer directly detect viruses? No, but CO₂ and PM2.5 effectively assess ventilation and aerosol risk.
2. What CO₂ concentration is safe?<800 1000="" ppm="">1500 ppm → immediate ventilation improvement.
3. Why is PM2.5 critical? It acts as a virus carrier, extending suspension and increasing spread.
4. What parameters does Nexisense measure? CO₂, HCHO, TVOC, NH₃, PM2.5/PM10, temperature/humidity, oxygen.
5. Can it automatically link with ventilation systems? Yes, via RS485, 4-20mA, or wireless.
6. Is the portable analyzer suitable for continuous monitoring? Yes, supports DC 24h operation and dual portable/fixed use.
7. How is data managed? Via mobile app, web cloud, or large display; trends and reports are generated automatically.
8. Main value for epidemic prevention? Quantify ventilation, detect hazards early, enable smart management, provide data support, and enhance public health confidence.

Conclusion

During regular epidemic control and heightened autumn-winter risk, indoor air management is essential. Nexisense multiparameter analyzers provide precise real-time assessment, and with intelligent linkage and big data platforms, enable a closed-loop of “detection and automatic problem-solving.” They help public spaces reduce respiratory infection risks, improve air quality, optimize energy consumption, and build public trust. Choosing reliable air quality monitoring solutions contributes to public health, corporate responsibility, and societal safety.