https://fire-safety.academy/w/index.php?action=history&feed=atom&title=File%3AFse-detector-activation-time-v2.svg 2026-11-04T14:57:29Z Revision history for this page on the wiki MediaWiki 1.43.11 https://fire-safety.academy/w/index.php?title=File:Fse-detector-activation-time-v2.svg&diff=2281&oldid=prev 2026-11-02T16:27:57Z

<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> Heat transfer to a ceiling-mounted heat detector: early in a fire, convection from the ceiling jet dominates, while radiation and conduction to the detector body are small. Based on Schifiliti et al. (2002), pp. 4-5 to 4-6.<br /> <br /> Original illustration for [[Detector activation time]], level 4 Expert.<br /> <br /> * Source basis: Schifiliti et al. (2002), p. 4-5 (heat transfer paths, radiation neglected in the initial stage, conduction negligible for isolated elements; Figure 4-1.4, redraw, do not copy) and p. 4-6 (plunge test, RTI)<br /> * Alt text: Cross-section of a heat detector under a ceiling: hot gas flows past the element; thick arrow for convection, thin arrows for radiation and conduction.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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