Best HomeKit Air Quality Sensors 2021

Eve's Room 2 indoor air quality monitor features a sharp industrial design complete with an LCD display. This portable monitor lasts up to six months on a single charge, allowing you to pick it up and place it in the various rooms within your home. This beautiful monitor also includes temperature and humidity sensors and built-in Bluetooth, enabling a direct to HomeKit connection without the need for a hub.

The Kaiterra Laser Egg+ CO2 is the latest in the company's line of HomeKit air quality sensors, which includes support for measuring PM2.5 fine dust and CO2 levels. This monitor sports a handy on device display, which reports the status of your home in an easy-to-see glanceable view. The Laser Egg also supports humidity and temperature sensors, as well as a built-in rechargeable battery capable of lasting up to eight hours per charge.

The VOCOlinc PureFlow may be expensive, but it is one of the few HomeKit-enabled air purifiers on the market, and it is loaded with extras. This purifier monitors the air in your home, and it can automatically ramp up its fan speeds to clean things up quickly if the quality drops. VOCOlinc's purifier also tracks temperature and humidity and puts all of its measurements just a glance away thanks to its large on-device display.

The Netatmo Smart Weather Station is the only HomeKit air quality sensor that can monitor air quality inside and out. This two-piece set includes an indoor module that tracks CO2, temperature, humidity, and a weatherproof outdoor monitor that gives you a truly local weather report. If that wasn't enough, this set can also measure sound levels with a built-in microphone and air pressure as it acts as a barometer.

The First Alert OneLink Safe and Sound may look like an ordinary smoke and CO detector, but it has an AirPlay 2 compatible speaker on-board for whole-home audio. Of course, this monitor also includes smoke and CO detection, with a built-in alarm, and both are capable of sending notifications to your iOS devices when something is awry. First Alert's detector also has a built-in rechargeable battery, protecting your home even when the power goes out and even Alexa too.