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

HPX11U3

IEEE / ANSI

ANSI/IEEE Three-wire ultrasonic sensor form

This reference locates three-wire ultrasonic sensor in Autodesk's IEEE-oriented ultrasonic switches family. This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction. The public library uses HPX11U3 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.

Drawing use: Schematic
Application: Metering & protection
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Normally Open 3 Wire. Autodesk IEEE Symbol Preview: Ultrasonic Switches, block HPX11U3. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

Three wires do not determine whether the output is sourcing, sinking or a particular voltage.

Full reference

HPX11U3

IEC

Three-wire ultrasonic sensor

This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction.

Drawing use: Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer
Form evidence: Three-wire ultrasonic sensor. Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

Three wires do not determine whether the output is sourcing, sinking or a particular voltage.

Full reference

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