Scientists have developed an “electronic nose” that can detect dangerous gases

A new electronic nose developed at the Norwegian University of Science and Technology can detect diseases, dangerous gases and spoiling food.

Although smell has historically played an important role in combating diseases such as plague and tuberculosis, The human nose is generally not sensitive enough to be used as a reliable diagnostic tool.

But a new electronic ‘nose’ inspired by our sense of smell could now detect undiagnosed diseases, dangerous gases and food that has started to spoil.

Michael Cheffena, a professor of telecommunications at the Norwegian University of Science and Technology (NTNU) in Gjovik, believes antenna technology is behind the breakthrough.

The antenna transmits radio signals of different frequencies. It then analyses how they are reflected back.
The shape of the signals changes according to the gases present, and when the antenna is turned on, more frequencies are transmitted.
“Other electronic noses can have several hundred sensors, often coated with different technologies. This makes them both very power-intensive to operate and expensive to manufacture. There is also a high material consumption. In contrast, the antenna sensor consists of a single antenna with a uniform coating,” Cheffena said.
The sensor technology has so far been tested on impact-damaged fruit and meat of different sizes. The researchers believe that by adjusting the algorithms to detect the unique odors of different gases, the technology could also sniff out diseases.
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