Now Smartphone can sense dangerous chemicals | Detect chemicals using phone

Jing Li, a scientist in California's NASA Ames Research Center, has designed a smartphone plug-in device that could sense chemicals from the environment. Current prototype of thedevice works with the iPhone, and plugs into the handset's bottom connector.
The device can detect Chemicals in ambient air such as methane, ammonia and chlorine gas, It's designed to connect to a network through WiFi or a regular phone connection in order to send alerts to other phones also equipped with the device, According to LI, a precious prototype of the device was the size of a soda can - this iteration, however,is touted as one of the smallest complete sensing -device in the world.