Here is an infrared camera that can be used to detect SF6 (Sulfur Hexafluoride) and 25 other harmful gases from a safe distance. Designed for plants, the device does not need you to interrupt the production process to work. It has embedded GPS data and lets you track leaks close by or meters away.
The device can be used to detect C2H4O2, NH3, C6H7NO2, C2H4, and other harmful gases. More information is available here.