Air Quality Sensor Explained: What Do the Colors Mean?

Air Quality Sensor Explained: What Do the Colors Mean?

Modern air purifiers often include built-in air quality sensors that display real-time conditions through indicator lights or digital screens. Understanding what the colors mean helps users make informed decisions about airflow, fan speed, and overall indoor air management.

How Air Quality Sensors Work

Sensors detect particulate concentration (PM2.5 levels) in the air. Based on these measurements, the purifier shows color indicators that represent air quality conditions.

Common Air Quality Colors and Their Meanings

  • Blue or Green – Good Air Quality
    Low pollutant levels; purifier may switch to low or sleep mode.

  • Yellow – Moderate Air Quality
    Mild pollutants present; suitable for medium fan speed.

  • Red – Poor Air Quality
    High particle concentration; purifier increases filtration speed to remove dust, smoke, or allergens.

Why Understanding Colors Matters

Recognizing sensor colors helps you:

  • Respond to changes quickly

  • Identify pollution sources (cooking, cleaning, outdoor air entering)

  • Adjust purifier settings manually if needed

  • Monitor long-term air quality trends in your home

Conclusion

Air quality sensor indicators provide a simple and effective way to understand your home’s environment. Knowing what the colors mean allows you to maintain cleaner, healthier indoor air more consistently.

FAQ — For Homes With Pets

Q1: Is the Airfire air purifier suitable for homes with cats and dogs?


Yes. Airfire is specifically designed for homes with pets. It captures pet dander, fur, and microscopic allergens as small as 0.3 microns through a HEPA filtration system. It also helps reduce pet odors to keep the indoor air fresh.

Q2: Can it help with pet allergies?


Yes. If someone in the home is allergic to pet hair or dander, this purifier can significantly reduce airborne allergens. Many users notice improvements in sneezing, itchy eyes, and nasal congestion within 1–2 weeks of regular use.

Q3: Will my cat or dog be scared of the purifier?


No. Airfire runs with low noise levels, especially in Sleep Mode. It operates quietly enough for pets to rest comfortably without being disturbed.

Q4: Can it remove pet odors (like litter box or dog smell)?


Yes. The activated carbon layer in the filter absorbs odor molecules effectively. For strong odors, running the purifier for 6–12 hours a day is recommended.

Q5: How often should I replace the filter in a pet home?


For homes with one or more pets, we recommend replacing the filter every 3–5 months depending on usage. The purifier will alert you when the filter needs replacement.