smoke detectors

     

A smoke etector or smoke alarm is a device that detects smoke and issues an alarm to alert nearby people that there is a potential fire. A household smoke detector will typically be mounted in a disk-shaped plastic enclosure about 150 mm in diameter and 25 mm thick, but the shape can vary by manufacturer.

Trivia about smoke detectors

  • These devices advocated by firemen can work by detecting either ions or changes in light
  • The two types of these home-signaling devices are photoelectric & ionization
  • NASA used this in Skylab back in 1973 to detect toxic vapors in the air
  • There are 2 types of these safety devices, photoelectric & ionization