Armenian Air Quality Index (ArmAQI) is a group of enthusiasts creating an independent air quality measurement system using open solutions. Project data is published on armaqi.org website, where there is no open data or direct access to raw data as of December 2025. Sensors can be configured to publish open data on Sensor.Community, but few people do this.
The device uses the affordable yet popular and highly reliable SDS011 particle sensor. Unfortunately, this sensor does not have high precision and is recommended only for tracking dynamics, but it can be calibrated using formulas.
The devices are equipped with Nova Fitness SDS011 and BOSCH BME280 sensors.
Sensors are usually installed on windows, which may affect measurement accuracy. Temperature readings in winter are often overestimated, but this placement reduces the impact of humidity, making particulate measurements more accurate.
PM2.5 pollution data from ArmAQI sensors is calibrated against data from Yerevan Municipality sensors. We update the calibration monthly as new data becomes available.
ArmAQI.org Project