{"schemaVersion":1,"slug":"iec-flame-detector-plan-symbol","name":"Flame detector plan symbol","kind":"symbol","abbreviation":"FD","aliases":["UV/IR flame detector","optical flame detector","radiation fire detector"],"category":"installation-communications","drawingTypes":["GA"],"referenceFamilies":["IEC"],"summary":"Plan symbol for a flame detector that senses ultraviolet or infrared radiation from flames, with its cone of view.","description":["Flame detectors sense the radiation emitted by flames, using ultraviolet, infrared or combined sensors. Plans draw the detector with radiation arrows and often the field-of-view cone so coverage can be checked against the protected hazard.","They are used for fuel stores, generator rooms, turbine enclosures and hazardous industrial areas where flaming fires are expected. Hazardous-area classification may also apply to the device, which the plan should tag. The cone drawn is approximate; sensitivity falls with distance and angle. Check the product data."],"readingNotes":["Check the cone covers the hazard.","Check hazardous-area markings."],"drawingChecklist":["Show field of view.","State sensor type.","State hazardous-area rating if any."],"distinction":"A smoke detector responds to particles; a flame detector responds to radiation from the flame.","facts":[{"label":"Sensing","value":"Ultraviolet, infrared or both"},{"label":"Coverage","value":"Cone of view"},{"label":"Exact standard graphic","value":"Not reproduced here; confirm the form against IEC 60617 and the project legend"}],"references":[{"sourceId":"iec-diagrams","relevance":"IEC graphical symbol context for installation plans; independently drawn here."},{"sourceId":"iec-public-radiation","relevance":"Public IEC-oriented radiation qualifiers relevant to optical and infrared detection marks."}],"related":["iec-smoke-detector-plan-symbol","iec-non-ionising-radiation-qualifier"],"artwork":"s28-iec-flame-detector-plan-symbol","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Flame detector","reference":"IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier."},"plainEnglish":{"title":"What does Flame detector plan mean?","introduction":"Flame detectors sense the radiation emitted by flames, using ultraviolet, infrared or combined sensors. Plans draw the detector with radiation arrows and often the field-of-view cone so coverage can be checked against the protected hazard.","example":"They are used for fuel stores, generator rooms, turbine enclosures and hazardous industrial areas where flaming fires are expected. Hazardous-area classification may also apply to the device, which the plan should tag. The cone drawn is approximate; sensitivity falls with distance and angle. Check the product data.","drawings":"Check the cone covers the hazard. Check hazardous-area markings. A smoke detector responds to particles; a flame detector responds to radiation from the flame.","terms":[{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."},{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"IEC graphical symbols for diagrams","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/"},{"label":"Autodesk IEC-60617 preview: Radiation qualifiers","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EABC81B4-549D-49C9-A0F5-086DD204A689.htm"}],"detail":"Plan symbol for a flame detector that senses ultraviolet or infrared radiation from flames, with its cone of view. A smoke detector responds to particles; a flame detector responds to radiation from the flame.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-flame-detector-plan-symbol","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-flame-detector-plan-symbol.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"IEC graphical symbol context for installation plans; independently drawn here."},{"id":"iec-public-radiation","title":"Autodesk IEC-60617 preview: Radiation qualifiers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EABC81B4-549D-49C9-A0F5-086DD204A689.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public IEC-oriented radiation qualifiers relevant to optical and infrared detection marks."}]}