In normal operation, the front facing LED indicator’s main function is to visually show your current measured air quality.
The Ruuvi Indoor Air Quality Score (IAQS) is a single number from 0 to 100 that summarizes how good or poor your indoor air quality is. It is based on two key factors: levels of fine particulate matter (PM2.5) and carbon dioxide (CO₂). These two measurements are combined into one easy-to-understand score so you can quickly assess air quality.
Here are the IAQS levels, what they mean, and their representative LED colours:
🟦 TURQUOISE – Above 90: Excellent air quality
🟩 GREEN – 80 to 90: Good air quality
🟨 YELLOW – 50 to 80: Fair air quality
🟧 ORANGE – 10 to 50: Poor air quality
🟥 RED – Below 10: Very poor air quality
Indoor Air Quality score is also visually represented in Ruuvi Station app with same colours and colour ranges.
Read more about Ruuvi Indoor Air Quality Score (IAQS) here.