Abstract: The present invention relates to detection and alarm systems for predicting and detecting the location of spills, leaks, emissions, and/or pollution sources, i.e., unwanted fluid (liquid/gas) flow/escape, at refineries, e.g., oil and gas refineries, and plants, e.g., petrochemical, chemical, pharmaceutical, and food processing plants, and avoiding said unwanted flow/escape. According to one embodiment, said system comprises at least one detector, at least one battery powered radio frequency transmitter, preferably, according to one embodiment, a 900 megahertz spread spectrum transmitter, and a central processing location which, according to one embodiment, is preferably capable of handling up to 3000 points in a single cell site.

Abstract: A system for detecting fugitive emissions including emissions from valves and bolted flange connections. The system includes (1) enclosures for valves and pipe flange connections, and (2) an indicating cartridge (detector/signaler) in communication with said enclosures.

Abstract: A monitoring device and system for detecting fugitive emissions including emissions from valves and bolted flange connections. The monitoring device includes (1) an enclosure with gaskets to seal the air space around the valve or between the members of the flange, and (2) an indicating cartridge installed contains material which will register a change if emissions leak into the enclosed air space.