Here is a high-end camera that can be used for gas leak detection. The FLIR GF320 Infrared Camera visualizes gas leaks in real time. It has GPS data added and lets you trace leaks to source and spot them from meters away. The device can detect Propane, Propylene, Methanol, Ethanol, Hexane, Toluene, and many other gases.
The FLIR infrared camera can scan large areas and pinpoint leaks in real time. It offers 320 x 240-pixel image resolution and video out functionality.