## Project Background
The 8-story chemistry building of the School of Chemistry and Chemical Engineering at this university houses over 60 laboratories, utilizing various gas types including combustible gases, toxic gases, inert gases, and special gases. Previously, manual inspection was relied upon, making it challenging to promptly detect leaks during unmanned periods at night.
## Implementation Plan
The solution is divided into three layers:
1. Laboratory bench area: Fixed multi-component detectors in each fume hood
2. Corridor area: one modular portable unit (accessible to students) every 30 meters
3. Hazardous chemical cabinet: Dedicated sniffer connected to the IoT platform
All data is aggregated to the college’s safety management platform, with thresholds refined by laboratory and time period (daytime/nighttime/holidays), and integrated with access control and ventilation systems.
## Implementation Effect
In the first semester after going online, four incidents of abnormal shutdown of nighttime fume hoods and two incidents of leakage due to aging seal rings in hazardous chemical cabinets were detected, all of which were addressed before the concentration reached the health limit. The annual safety inspection of the college was reduced from “8 deduction items” to “no deductions”.
