TY  - JOUR
AU  - Ahmed, Tanvir
TI  - Thermal Drift in Low-Cost PM2.5 Sensors: A Two-Year Field Study in Dhaka
JO  - Open Access Journal of Engineering Applications
PY  - 2025
VL  - 49
IS  - 2
SP  - 842
EP  - 849
AB  - Low-cost optical particulate sensors are increasingly deployed in dense urban networks, but their calibration is typically validated over weeks rather than years. We report drift characteristics for 38 co-located sensors over 24 months, and show that a single temperature-compensation term fitted in the first month loses validity after roughly 300 days.
KW  - air quality
KW  - sensor calibration
KW  - PM2.5
KW  - urban monitoring
KW  - drift
SN  - 3105-7004
DO  - 10.55555/oajea.2025.4902.001
UR  - https://journal.bsaps.com/article/44
ER  -