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AirGradient ONE: A Small Company's Fight Against a Flawed Tech Review

2025-08-06

AirGradient, a small company known for its open-source air quality monitor, the AirGradient ONE, found itself unfairly labeled "Not Recommended" by WIRED magazine due to a single hardware failure on the review unit. This, despite the device's recognition in rigorous scientific evaluations and its popularity among users. The founder argues the review lacked objective methodology, comparing inconsistent judgments across different monitors. The article calls for greater transparency and rigor in tech journalism, highlighting how flawed reviews harm both manufacturers and consumers who rely on them for accurate product information, especially in health-related areas like air quality monitoring.

Sensirion SGP41 TVOC Sensor Accuracy Test: Relative Changes, Not Absolute Values

2024-12-15

AirGradient conducted accuracy and precision tests on the Sensirion SGP41 TVOC sensor used in their air quality monitors. The tests revealed that the sensor effectively tracks relative changes in TVOC levels – detecting increases or decreases – but cannot provide precise absolute values. This is due to limitations inherent in low-cost VOC sensors, including lack of specificity, cross-sensitivity, environmental sensitivity, and baseline drift. While the sensor cannot precisely measure TVOC concentrations, it still offers practical value in identifying TVOC sources and for environmental monitoring. Future testing by AirGradient will explore sensor performance under various conditions to further understand its capabilities and limitations.