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

FS LIQ

IEEE / ANSI

ANSI/IEEE liquid flow switch symbol

The flow-switch form associates an electrical contact with a documented flow condition. A cooling-system permissive or loss-of-flow alarm needs the process circuit and operate condition to be identified, rather than a bare contact label.

Drawing use: Schematic
Application: Control circuits
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented Miscellaneous Switches functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

A flow switch reports a discrete condition while a flow transmitter reports a measured quantity.

Full reference

FS LIQ

Symbols

Liquid flow switch

A liquid-flow switch issues a contact state when a documented flow condition actuates it. It is used in cooling or auxiliary systems where flow confirmation participates in permissives or alarms.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

A flow switch gives a discrete condition; a flow transmitter gives a measured signal.

Full reference

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