NASA works on a chemical sensor for iPhone

Several NASA scientists are working on a project called Cell-All - compact, low-cost, low-power, high-speed nanosensor-based chemical sensor for cell phones.

The device is about the size of a postage stamp and is designed to be plugged in to an iPhone to collect, process and transmit sensor data. The new device is able to detect and identify low concentrations of airborne ammonia, chlorine gas and methane. The device senses chemicals in the air using a "sample jet" and a multiple-channel silicon-based sensing chip, which consists of 16 nanosensors, and sends detection data to another phone or a computer via telephone communication network or Wi-Fi.

Update: Here are new cool photos:

via nasa