Outdoor leaks from storage tanks or pipelines are a particular kind of hazard. Many outdoor areas won’t have permanent, fixed detection. If you rely on your personal monitor, by the time it alarms, you could be engulfed in a hazardous gas cloud. A temporary early warning system between you and the potential source of a gas hazard can alert you to trouble coming your way.
The emergence of digital and communications technologies means much more information can be communicated to a control system, with the added benefit of reduced cabling costs. So, I thought it might be useful to provide an overview of the various technologies available.