Best Air Quality Monitors Under £100 in 2026

This monitor stands out with its robust features, including a Bluetooth CO2 monitor that tracks temperature and humidity, alongside an impressive 2-year data storage. While it requires a SwitchBot Hub for WiFi functionality, the accuracy and user-friendly interface make it ideal for tech-savvy users looking to integrate air quality monitoring into their smart home.

The Temtop monitor is portable and versatile, making it perfect for home, office, or school use. It effectively measures carbon dioxide levels, temperature, and humidity, providing essential data for maintaining a healthy indoor environment. The only compromise is its lack of advanced features like WiFi connectivity, but for straightforward monitoring, it excels.

With a large display and voice alert feature, the Newentor monitor is user-friendly and effective. It caters well to families and classrooms, alerting users when CO2 levels exceed safe limits. While it lacks some smart features, its affordability and ease of use make it a solid choice for those who want clear visibility of air quality without the bells and whistles.

This compact and rechargeable monitor is perfect for those on the go, whether at home, work, or during travel. The LCD display is clear, but the battery life may vary depending on usage. It's best for individuals who want a portable solution without sacrificing basic functionality.

This advanced model offers WiFi capabilities, working seamlessly with Alexa, Apple Home, and Google Home. Its IP65 rating ensures durability, making it suitable for various environments. However, the higher price may not justify the added features for users who just need basic monitoring. It's perfect for smart home enthusiasts who want full integration.

Though it’s budget-friendly and features a digital display, the Brandson monitor falls short in terms of accuracy, which can be a concern for health-conscious users. It may work well in low-demand situations but is best avoided for those who need precise readings. Ideal for casual users or those new to air quality monitoring who want an entry-level device without a hefty investment.