ISEF 2019 Team Profile Kelvin Du – Tru-Alert: A Smoke Alarm with Steam Sense technology

Smoke alarms can save lives. However when they are triggered unnecessarily it can reduce their effectiveness. Kelvin investigated the effect of higher humidity levels on smoke alarm triggering and found that the alarms were indeed more sensitive in the presence of water vapour. He then used a simulation software and designed a prototype to determine that the incidence of false alarms could be reduced by comparing the signal from the smoke alarm and the humidity sensor, while still triggering in the case of an actual fire.