Journal of Sensors / 2018 / Article / Tab 5

Research Article

Design and Development of a Low-Cost, Portable Monitoring Device for Indoor Environment Quality

Table 5

IEQ index scoring system.

IEQ parameter“Good”“Average”“Poor”“Bad”

Humidity40–50%50–60%60–70%70 > H > 40%
Temperature20–24°C16–20°C24–26°C26 > T > 16°C
PM2.50–10 μg/m310–15 μg/m315–35 μg/m3>35 μg/m3
PM100–50 μg/m350–80 μg/m380–150 μg/m3>150 μg/m3
Total VOC0–200 ppb200–350 ppb350–500 ppb>500 ppb
CO2350–500 ppm500–1000 ppm1000–5000 ppm>5000 ppm
CO0–3 ppm3–8 ppm8–10 ppm>10 ppm
Indoor air quality0–10 ppm10–25 ppm25–50 ppm>50 ppm
Illuminance300–500 lux200–300 lux100–200 lux<100 lux
Sound levels0–40 dB40–70 dB70–80 dB>80 dB
Scoring impact00.20.51.0