Research Article
Design and Development of a Low-Cost, Portable Monitoring Device for Indoor Environment Quality
Table 1
Sensors deployed within the IEQ-monitoring unit.
| Product | Type | Manufacturer | Operating principle |
| SHT31 | Temperature & humidity | Sensirion | CMOS technology | HPMA115S0 | Particulate matter | Honeywell | Laser-based light scattering | CCS811 | Total VOC (TVOC1) | AMS | Metal oxide gas sensor | iAQ-Core C | Total VOC (TVOC2) | AMS | Micromachined MOS technology | MiCS-VZ-89TE | Total VOC (TVOC3) | SGX Sensortech | MOS technology | T6713 | CO2 | Amphenol | Nondispersive infrared (NDIR) | LLC 110-102 | CO | SPEC Sensors | Amperometric gas sensor | LLC 110-801 | Indoor air quality | SPEC Sensors | Amperometric gas sensor | TSL2561 | Illuminance (light) | TAOS | Infrared-responding photodiode | Adafruit #1063 | Microphone | Adafruit | Electret microphone with amplifier |
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