Smoke alarms that trigger each other
Posted 11.08.2005 at 2:00 am 0 Comments

hmtechAlarm_485.jpg

When an alarm in one part of the house senses smoke or carbon monoxide, it sets off its own 85-decibel siren and every other alarm's too, communicating over a wireless 915-megahertz radio network. The alarms also announce the location of the fire or CO leak. $80 per alarm

0 Comments



Download Our iPhone App

Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing



Follow Us On Twitter

Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed



Become a Fan On Facebook

Share links with friends, comment on stories and more


December 2009: Best of What's New

In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.

Check out the best of what's new here.

Popular Science Photo Pool


Share your photos in the Pop Sci pool at www.flickr.com!
tags_sprite.png
POP_embeddedForm_cover_May09.jpg