Your Old Devices Depend on Dying Sensors. The Silicon Labs Incident Proves It
a day ago
- #sensor-discontinuation
- #environmental-measurement-validation
- #soft-sensing-framework
- Silicon Labs Si7021 sensor was widely used but discontinued in January 2025 due to Polybenzoxazole insulation and PFAS-related compliance issues, not performance.
- No direct replacement caused disruption, leading to the proposal of the Differential Temporal Derivative Soft Sensing (DTDSS) framework for maintaining measurement capability with cost-effective sensors like Aosong AHT20.
- Datasets from Sri Lanka's Department of Meteorology and FIAPhy device were used to validate solar radiation and heat flux estimates, comparing with professional equipment like pyranometers.
- Supplementary resources include open-source data repositories and official platforms for applying DTDSS and FIAPhy technology in projects.