The best smoke detectors are loud and reliable, alerting you to a fire in an emergency. During testing, X-Sense and First ...

An hourglass tells you what it is in the name — a glass that you use to measure an hour of time passing by. [EDISON SCIENCE CORNER] has built a digital project that mimics such a thing, with little ...

You may experience allergy-like symptoms when coming into contact with tobacco and cigarette smoke. This is unlikely to be an allergy to the smoke itself, but rather a trigger to a preexisting ...

Ionization smoke alarms use a battery and two metal plates, called electrodes, to create an electrical circuit. Ions are tiny, electrically charged particles that flow through the circuit and between ...

New York City was the site of what could have been the world’s biggest cigarette break Friday, with more than 1,500 smokers assembling outside Washington Square Park to get their nicotine fix. Park ...

Shopping for a security system or upgrade means choosing between many different sensors and devices. It's easy to fall into the "more is better" trap, especially if there's sale or special deal ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...