The Atmotube Pro 2 represents a significant upgrade over its predecessor, adding a carbon dioxide sensor and improving sensor accuracy. Reviewers noted the device's ability to measure PM2.5, NOx, and TVOC with high correlation to reference standards, though some users reported issues with CO2 calibration. The inclusion of GPS and USB-C data access enhances its utility for field research and personal monitoring. While the device excels in outdoor exposure tracking and data collection, the carbon dioxide sensor's reliability remains a concern for some users. This monitor is ideal for researchers and health-conscious individuals seeking comprehensive air quality data but may not be suitable for those requiring highly accurate CO2 measurements.
Full review
Sensor Suite and Accuracy
The Atmotube PRO 2 represents a significant upgrade over its predecessor with an expanded sensor array that includes a carbon dioxide sensor (Sensirion STCC4), an enhanced TVOC sensor (Sensirion SGP41), and additional environmental measurements. According to See The Air's Sotirios Papathanasiou, the CO2 readings show a high correlation of R2=0.98, though initial out-of-the-box values required fine-tuning, with a consistent offset of about 200 ppm. Breathesafeair.com reviewer noted that while the device initially matched readings from an Aranet4 Home, systematic deviations emerged over time, potentially due to automatic calibration issues. The PM2.5 sensor (Sensirion SPS30) demonstrated impressive accuracy with an R2=0.73 when collocated with a Beta Attenuation Monitor (BAM), meeting EPA thresholds for non-regulatory indicators despite challenging outdoor conditions including rain and low temperatures. This level of accuracy positions the PRO 2 as a reliable tool for personal exposure studies, though firmware issues with CO2 readings remain a concern.
The device's ability to measure PCN0.5 particle bins is particularly noteworthy, as it aligns with Global Open Air Quality Standards' recommendations to move beyond standard PM2.5 monitoring. HouseFresh's Danny Ashton praised the lab-level sensor accuracy, noting the PM2.5 measurement accuracy of ±10 µg/m³ or ±10% which matches some of the best-tested monitors. However, the lack of a display means users must rely on the smartphone app for data access, a limitation that Airpurifierfirst.com's Milan Antonic identified as potentially impractical for home or office use. The integration of multiple sensors including temperature, humidity, pressure, and NOx detection provides comprehensive environmental data, though the device's accuracy in CO2 measurements remains inconsistent according to early user reports.
Design and Portability
The Atmotube PRO 2 maintains the familiar rugged aesthetic of its predecessor while incorporating several design improvements that enhance portability and functionality. Weighing just 106 grams (3.7 oz) with dimensions of 86 x 50 x 22 mm (3.4 x 2 x 0.9 in), the device is compact enough to attach to clothing or backpacks. HouseFresh's Danny Ashton highlighted its small size and ease of attachment to trousers or backpack straps, making it ideal for commuters and travelers. The device features a single button for quick air quality checks, with LED indicators showing current conditions, though this simplicity also means no direct data access without the smartphone app. The inclusion of a USB-C port for direct data access and a 2300 mAh battery provides up to 10 days of operation at 15-minute intervals, though battery life is significantly reduced when continuous monitoring is enabled.
The PRO 2's build quality reflects its intended use in both indoor and outdoor environments, with the addition of an embedded GPS chip and accelerometer for location-aware data collection. See The Air's review emphasized that the GPS chip uses an internal accelerometer to wake only during movement, preserving battery life. The device's 16 MB internal memory allows for up to 45 days of data storage depending on history intervals, a significant upgrade from the previous 256 KB capacity. However, the device's reliance on smartphone connectivity for data access and app functionality creates a dependency that some reviewers found limiting, particularly for users seeking standalone operation. The lack of a built-in screen means users must constantly rely on their mobile devices to interpret readings, which may be inconvenient for those who prefer immediate visual feedback.
App and Connectivity
The mobile app for the Atmotube PRO 2 has been significantly enhanced to accommodate the expanded data set from multiple sensors. See The Air's Sotirios Papathanasiou noted that the app now mirrors professional-grade capabilities of the Atmotube Cloud, with improved data synchronization speed and intuitive browsing of historical trends. The app allows users to adjust baseline values for CO2, temperature, and humidity, providing transparency that makes the data more reliable for personal exposure studies. Airpurifierfirst.com's Milan Antonic praised the app's detailed overview of air quality data, including a live map showing current air quality collected from other users around, which enhances the device's value for community-based air quality awareness. However, the app's performance has been criticized for its dependency on smartphone connectivity, with HouseFresh's reviewer noting that the battery drains quickly when updates occur every minute.
The Bluetooth 5.0 connectivity ensures reliable data transmission, though the app's interface has been described as more complex than necessary for casual users. According to the Atmotube Store, the device syncs with multiple devices and supports direct USB-C data access, which is a significant improvement over previous models. The integration of GPS data has transformed the Air Quality Map into a high-resolution exposure diary, allowing users to track their movements and correlate air quality with specific locations. However, the app's ability to function independently without constant smartphone tethering remains a limitation, particularly for users who prefer offline operation or have limited smartphone battery life during extended outdoor activities.
Battery Life and Power
Battery performance remains one of the most significant limitations of the Atmotube PRO 2, with HouseFresh's Danny Ashton reporting that users must charge the device daily for optimal use. The manufacturer's claim of up to 24 hours in continuous monitoring mode is contradicted by real-world testing, where battery life drops significantly when users enable frequent updates. Airpurifierfirst.com's Milan Antonic noted that while the device can achieve up to 10 days of operation at 15-minute intervals, this is only possible when measurement intervals are set to longer durations. The 2300 mAh battery, while substantial for a portable device, proves insufficient for users who require real-time monitoring, particularly in environments with high air quality variability. The device's power consumption increases dramatically when GPS and multiple sensors are active simultaneously, leading to rapid battery drain.
The inclusion of USB-C charging and direct data access capabilities helps mitigate some power concerns, but the overall battery performance remains unsatisfactory for extended outdoor use. Users who plan to use the device continuously throughout the day will find themselves needing frequent recharging, which undermines the portability advantages of the device. The device's power management system appears to prioritize data collection over battery conservation, particularly when GPS tracking is enabled. This trade-off between data richness and battery life is a key consideration for users who prioritize extended outdoor monitoring over immediate access to real-time data.
What Reviewers Loved
Reviewers consistently praised the Atmotube PRO 2's comprehensive sensor suite and its ability to provide detailed environmental data in a compact form factor. See The Air's Sotirios Papathanasiou highlighted the device's transformation from a consumer gadget to a serious scientific tool, noting that the shift from 256 KB to 16 MB of internal memory provides up to 45 days worth of data storage. The inclusion of GPS and accelerometer sensors was particularly appreciated, as it enables location-aware data collection without significantly impacting battery life. Breathesafeair.com's reviewer emphasized the device's potential to halve the number of monitors users carry, particularly for those who commute or travel frequently. The ability to measure both PM2.5 and CO2 in a portable package addresses a long-standing gap in the market, according to multiple reviewers who noted this combination as a major selling point.
The enhanced app functionality and data visualization features were also widely praised, with Airpurifierfirst.com's Milan Antonic noting the excellent smart app equipped with a wide range of settings and advanced features. The device's ability to trigger alerts with different air quality scores was highlighted as a valuable feature for users concerned about health impacts. The PM2.5 sensor accuracy of ±10 µg/m³ or ±10% was consistently cited as excellent, matching or exceeding the performance of other high-end monitors. Users appreciated the device's ability to provide real-time data that can be used for personal exposure studies, particularly with the inclusion of PCN0.5 particle bin measurements that align with global air quality standards. The device's portability and ease of attachment to clothing or backpacks were also frequently mentioned as positive attributes.
Where It Falls Short
Despite its impressive features, the Atmotube PRO 2 suffers from several significant drawbacks that limit its practicality for many users. The most pressing issue is the inconsistent CO2 sensor performance, with Breathesafeair.com's reviewer noting systematic deviations from reference devices like the Aranet4 Home, potentially due to automatic calibration issues. The device's battery life is insufficient for extended outdoor use, requiring daily charging for optimal performance, which undermines its portability claims. HouseFresh's Danny Ashton reported that the battery drains quickly when users enable frequent updates, making continuous monitoring impractical for most users.
The lack of a built-in display and reliance on smartphone connectivity for data access creates usability challenges, particularly for users who prefer immediate visual feedback or operate in areas with limited smartphone reception. Airpurifierfirst.com's Milan Antonic criticized the device's practicality for home or office use, noting that the absence of a screen makes it less convenient than desk-based monitors. The app's complexity and dependency on smartphone connectivity also pose barriers for casual users. Additionally, the price increase from the original model ($189 to $249) without corresponding improvements in core functionality raises questions about value for money, particularly given the unresolved firmware issues with CO2 measurements. The device's performance in extreme conditions, such as continuous rain or low temperatures, while showing promise, still requires further validation.
Who It's Best For
The Atmotube PRO 2 is best suited for users who prioritize comprehensive environmental monitoring and have access to smartphone connectivity for data interpretation. Outdoor enthusiasts, frequent travelers, and commuters who want to track both particulate matter and carbon dioxide levels during their daily activities will find the device particularly valuable. According to See The Air's review, the device's combination of GPS tracking and multiple sensors makes it ideal for users who want to understand their exposure patterns during travel or outdoor activities. The device's ability to measure PCN0.5 particles and provide detailed exposure data aligns well with users interested in scientific or health-focused air quality monitoring.
The device is particularly appealing to researchers or citizen scientists who need portable, accurate monitoring equipment for field studies. The inclusion of 16 MB internal memory and direct USB-C data access capabilities make it suitable for extended deployment without constant smartphone tethering. However, users seeking a standalone device for home or office use should look elsewhere, as the lack of a display and reliance on smartphone connectivity make it less practical for those environments. The device's battery limitations also make it unsuitable for users who require extended outdoor monitoring without access to charging facilities. Those who primarily need indoor CO2 monitoring or simple particulate matter tracking may find better value in more affordable alternatives with dedicated displays.
Value at This Price
At $249, the Atmotube PRO 2 represents a premium price point that reflects its advanced sensor capabilities and expanded functionality. However, this cost is not universally justified given the unresolved firmware issues with CO2 measurements and the device's battery limitations. Breathesafeair.com's reviewer noted the price increase from the original model ($189) without corresponding improvements in core functionality, particularly regarding the CO2 sensor issues that have been reported by multiple users. The device's value proposition is strongest for users who need the combination of PM2.5 and CO2 monitoring in a portable package, but the $60 price increase may not be warranted for those who primarily use it for one or two sensor types.
Airpurifierfirst.com's Milan Antonic recommended the device for frequent travelers and outdoor users, but noted that for home use, there are many better and more affordable alternatives such as the Qingping Gen 2 or Temtop M10i. The device's ability to provide real-time data with a live map showing current air quality collected from other users adds value for community-based monitoring, though this feature requires smartphone connectivity. The inclusion of GPS tracking and enhanced data storage capabilities justify the premium price for users who require these specific features, but casual users may find the cost disproportionate to their needs. The device's performance in extreme conditions, while promising, requires further validation before justifying the premium price for all users.
Strengths
- +Includes carbon dioxide sensor (Sensirion STCC4) for indoor air quality monitoring
- +Upgraded PM sensor (Sensirion SPS30) provides accurate particle concentration measurements
- +Built-in GPS and accelerometer enable location-aware data collection without excessive battery drain
- +USB-C port allows direct data access and sync across multiple devices
- +Improved app with faster data synchronization and geospatial mapping capabilities
Watch-outs
- −Carbon dioxide measurements have reported systematic calibration issues
- −Initial CO2 readings required manual adjustment to align with reference standards
- −Some users experienced inconsistent performance with CO2 sensor accuracy
How it compares
The Atmotube PRO 2 provides improved PM sensor accuracy and GPS tracking, but its CO2 sensor has reported calibration issues that make it less reliable than the Qingping Gen 2, which offers consistent Sensirion sensor performance. While it's better suited for field research than the Awair Element, which lacks GPS capabilities, the Atmotube PRO 2's CO2 accuracy problems make it less ideal for users requiring precise carbon dioxide monitoring.
Who this is for
At a glance: field researchers.
Why you’d buy the Atmotube PRO 2
- Includes carbon dioxide sensor (Sensirion STCC4) for indoor air quality monitoring.
- Upgraded PM sensor (Sensirion SPS30) provides accurate particle concentration measurements.
- Built-in GPS and accelerometer enable location-aware data collection without excessive battery drain.
Why you’d skip it
- Carbon dioxide measurements have reported systematic calibration issues.
- Initial CO2 readings required manual adjustment to align with reference standards.
- Some users experienced inconsistent performance with CO2 sensor accuracy.
Rating sources
Our 4.3 score is the average of these published ratings. More about methodology.
