Sniffing for bad air

Handheld carbon dioxide sensor can help identify classrooms with unhealthy ventilation rates

By Sid Perkins, 11:00 AM September 14, 2012




In the past few weeks, millions of students, teachers and staff have returned to classrooms in schools across the United States. The air quality in many of those classrooms might be unhealthy, thanks to poor ventilation. But a new sensor designed to identify elevated amounts of carbon dioxide could help solve the problem — and maybe even boost test scores, scientists report.


The handheld device developed by a chemist and his colleagues is easy to use: Simply carry it into a room where you ...

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