We Continue the Work of Those
Who Were the First.

  • Electrical Engineering
  • Light & Lighting
  • Power Engineering
  • Transportation
  • Automation
  • Communication
  • Smart Buildings
  • Industry
  • Innovation

Current issue

ELEKTRO 2/2017 was released on February 17th 2017. Its digital version will be available on March 10th 2017.

 

Topic: Electrical appliances – switching, protective and signalling; Devices for smart grids

 

Main Article

Atypical concept of DC power supply source for high current consumption

SVĚTLO (Light) 1/2017 was released on February 7th 2017. Its digital version will be available on March 7th 2017.

Fair and exhibitions
Invitation on LIGHT IN ARCHITECTURE exhibition 

Architectural and scenic lighting
Lighting design in a nutshell
Spiegeltent illumination and its specificity

Wireless, wearable toxic-gas detecto

30.06.2016 | MIT | news.mit.edu

MIT researchers have developed low-cost chemical sensors, made from chemically altered carbon nanotubes, that enable smartphones or other wireless devices to detect trace amounts of toxic gases.

Using the sensors, the researchers hope to design lightweight, inexpensive radio-frequency identification (RFID) badges to be used for personal safety and security. Such badges could be worn by soldiers on the battlefield to rapidly detect the presence of chemical weapons — such as nerve gas or choking agents — and by people who work around hazardous chemicals prone to leakage.

Wireless gas detector

The sensor is a circuit loaded with carbon nanotubes, which are normally highly conductive but have been wrapped in an insulating material that keeps them in a highly resistive state. When exposed to certain toxic gases, the insulating material breaks apart, and the nanotubes become significantly more conductive. This sends a signal that’s readable by a smartphone with near-field communication (NFC) technology, which allows devices to transmit data over short distances. The sensors are sensitive enough to detect less than 10 parts per million of target toxic gases in about five seconds.

Moreover, the sensors each cost about a nickel to make; roughly 4 million can be made from about 1 gram of the carbon nanotube materials.

Read more at MIT

Image Credit: MIT

-jk-