# Flame detector plan symbol

Canonical URL: https://eloragrid.ai/symbols/iec-flame-detector-plan-symbol
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: FD
Drawing use: GA
Reference families: IEC

## Symbol convention

Convention: IEC
Form: Flame detector
IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

Plan symbol for a flame detector that senses ultraviolet or infrared radiation from flames, with its cone of view.

## In plain English

### What does Flame detector plan mean?

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.

### A simple 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.

### What the drawings help you do

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.

### This particular reference

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.

### Terms

- Signal: Electrical information passed between devices, rather than necessarily the main power supply.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [IEC graphical symbols for diagrams](https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/)
- [Autodesk IEC-60617 preview: Radiation qualifiers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EABC81B4-549D-49C9-A0F5-086DD204A689.htm)


## What it represents

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.

## How to read it

- Check the cone covers the hazard.
- Check hazardous-area markings.

## Information to show or reference

- Show field of view.
- State sensor type.
- State hazardous-area rating if any.

## Important distinction

A smoke detector responds to particles; a flame detector responds to radiation from the flame.

## Facts

- Sensing: Ultraviolet, infrared or both
- Coverage: Cone of view
- Exact standard graphic: Not reproduced here; confirm the form against IEC 60617 and the project legend

## Public references

- [IEC graphical symbols for diagrams](https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/) — IEC. IEC graphical symbol context for installation plans; independently drawn here.
- [Autodesk IEC-60617 preview: Radiation qualifiers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EABC81B4-549D-49C9-A0F5-086DD204A689.htm) — Autodesk. Public IEC-oriented radiation qualifiers relevant to optical and infrared detection marks.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.