Let us leave it to NASA, the first Star Trek tricorder to develop! A scientist of the space agency has built a prototype of a postage stamp sized chip a latest technical part is best gadgets and iPhone and a suitable App. What has the device on it? It can sniff toxic gases in the air. The concept is not new, but the example has been working very well and easy. Developer Jingo Li and his investigate team in California have set the iPhone with a clever add-sensor.

A silicon-based multi-sensor chip is inserted into a micro-board with 64 Nan sensors. The device is cheap and a good product requires little energy and can still detect minimal concentration of ammonia and chlorine gas and methane. The values indicate the sensor into an iPhone App. The conclusion may the sensor routinely via Wi-Fi or 3G mobile phones or other a central server where quick evacuation events must be taken. Now you should react to the Tricorder only can join to a transporter to people quickly.