File:Fse-heat-detector-v2.svg

Fse-heat-detector-v2.svg (SVG file, nominally 900 × 600 pixels, file size: 8 KB)

Summary

Element temperature lags behind gas temperature. Based on U.S. Nuclear Regulatory Commission (2005), p. 12-2 and Schifiliti, Meacham, and Custer (2002), p. 4-7.

Diagram for the article Heat detector (Fire Safety Academy wiki, level 1 Basic).

Source basis: U.S. Nuclear Regulatory Commission (2005), p. 12-2; Schifiliti, Meacham, and Custer (2002), p. 4-7
Alt text: Gas temperature rises quickly while element temperature follows more slowly past the rating.

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New drawing by Fire Safety Academy. © Fire Safety Academy.

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	Date/Time	Dimensions	User	Comment
current	15:59, 2 November 2026	900 × 600 (8 KB)	Sanne (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity
	09:02, 2 November 2026	900 × 600 (8 KB)	Sanne (talk \| contribs)	Add modest Fire Safety Academy logo-icon watermark
	08:08, 2 November 2026	900 × 600 (6 KB)	Sanne (talk \| contribs)	Upload fse-heat-detector-v2.svg: diagram for Heat detector (level-1 visual plan V2)

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Heat detector

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Short title	Gas temperature rises quickly while element temperature follows more slowly past the rating.
Image title	Qualitative chart without numerical values. The gas temperature at the detector rises quickly; the sensing element temperature follows more slowly. The gas passes the rated temperature first; the element reaches the rated temperature later, which is the activation point. The time between is the thermal lag, and at activation the gas temperature is already above the rated temperature.
Width	900
Height	600