Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

IEC

Flame detector plan symbol

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.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Flame detector. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

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

Full reference

IEC

Smoke detector plan symbol

Point smoke detectors are drawn on fire alarm layouts as a square or circle with a smoke mark inside, such as wavy lines or the letter S, at their ceiling position. Each symbol is usually tagged with its loop and device address so the plan doubles as the commissioning record.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Smoke detector. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

A heat detector responds to temperature, not smoke; it uses a different internal mark.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.