Critical Cloud Diameter

The design of gas detection systems involves numerous parameters typically determined by heuristics, or “rules of thumb.” One key parameter is the “critical cloud diameter,” which significantly influences the coverage achieved using the geographic coverage method. This parameter is also closely linked to the spacing of detectors in a grid layout (commonly, the 5-meter grid). While many professionals are familiar with these figures, they often lack an understanding of their origins, assumptions, and underlying analysis.

This webinar will delve into the history of the 5-meter grid, the testing conducted to establish these numbers, and the factors affecting their applicability, such as methane at a 30% obstruction ratio.