Understand the difference.

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

FS GAS

IEEE / ANSI

ANSI/IEEE Gas flow switch form

This reference locates gas flow switch in Autodesk's IEEE-oriented miscellaneous switches family. A gas-flow switch changes contact state for a specified gas-flow condition. Its process connection and operating requirement belong in the equipment schedule as well as the control logic. The public library uses HFS11S20 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Flow Switch Normally Open - Gas. Autodesk IEEE Symbol Preview: Miscellaneous Switches, block HFS11S20. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

Gas-flow actuation is a process-specific input and is separate from the contact's electrical rating.

Full referenceAdd to legend

FS GAS

Symbols

Gas flow switch

A gas-flow switch changes contact state for a specified gas-flow condition. Its process connection and operating requirement belong in the equipment schedule as well as the control logic.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

Gas-flow actuation is a process-specific input and is separate from the contact's electrical rating.

Full referenceAdd to legend

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