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Current issue

ELEKTRO 7/2021 was released on June 30th 2021. Its digital version will be available on July 30th 2021.

Topic: Cables, wires and cable engineering; Tools, equipment and accessories for work with cables

Technical product information
New generation of surge protection DACF25S by CITEL
Reusable cleaning cloths for industry, craft and total cleanness

SVĚTLO (Light) 3/2021 was released 6.18.2021. Its digital version will be available 7.19.2021.

Interiors lighting
New atelier lighting of Rony Plesl
Lighting realization INGE or good news there is never enough

Measurements and calculations
Meter of UV radiation VOLTCRAFT UV-500

Wireless, wearable toxic-gas detecto

30. 6. 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

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