https://fire-safety.academy/w/index.php?action=history&feed=atom&title=File%3AFse-beam-smoke-detector-v3.svg 2026-11-04T15:47:56Z Revision history for this page on the wiki MediaWiki 1.43.11 https://fire-safety.academy/w/index.php?title=File:Fse-beam-smoke-detector-v3.svg&diff=2179&oldid=prev 2026-11-02T16:18:07Z

<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> Optical density of evenly spread smoke at alarm against the obscuration setting, for three beam lengths. Based on Ministry of Business, Innovation and Employment (2025b), p. 28.<br /> <br /> Original vector illustration for [[Beam smoke detector]], level 2 Intermediate.<br /> <br /> * Source basis: Ministry of Business, Innovation and Employment (2025b), p. 28 (formula, typical range 20-70 %, example 10 m and 50 % = 0.030 m⁻¹)<br /> * Alt text: Line chart of optical density at alarm against obscuration setting for beams of 10 m, 50 m and 100 m; longer beams alarm at lower optical density.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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