The Reliability Challenge of Low-Cost Air Quality Sensors Unveiled

A recent study conducted by the Center for Study of Science, Technology and Policy (CSTEP) has revealed significant inconsistencies in the accuracy of low-cost air quality sensors. These discrepancies occur not only between devices from different manufacturers but also among those from the same brand, raising questions about their reliability over time.

The study, titled 'Performance Evaluation of Multi-pollutant Air Quality Sensors at Indi-SET, Bengaluru, India -- First Edition,' examined 48 sensor devices from six manufacturers. These sensors, crucial for pollution monitoring in developing countries like India, displayed varying readings unless calibrated for local conditions.

The findings emphasize the necessity for proper calibration and regular performance checks every three to six months to maintain sensor accuracy, given the varying environmental conditions across different regions.

(With inputs from agencies.)