Think of a cigarette slowly burning but never actually bursting into flames. Smoke detection testing in progress. A smoldering fire can and will become a flaming fire if proper action is not taken ...

However, aerosolized particles, such as dust and moisture, generated by routine cooking, cigarette smoke, etc. can flow into the detector, setting off an unwanted alarm, which is in turn triggered ...

The device looks like a smoke detector, but it sniffs vaping fumes ... say they’ve seen a significant decrease in e-cigarette use at school since the sensors have been installed.