IQAir is a Swiss air quality company known for its high-end air purifiers and the AirVisual line of air quality monitors. Its monitors track PM2.5, CO2 and other metrics and feed a global air quality network and app. IQAir appeals to users who want professional-grade air purification and monitoring data.
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ChinaQingping Technology is a Beijing company that builds indoor environmental sensors, and one of the better known hardware partners in the Xiaomi ecosystem. Its range covers air quality monitors that measure PM2.5, PM10, CO2, temperature and humidity, plus thermometer-hygrometers, motion and light sensors and a Bluetooth gateway. Devices pair with the Qingping+ app and, depending on model, with Apple HomeKit, Amazon Alexa, Google Home and Mi Home.
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