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

HPX1U

IEEE / ANSI

ANSI/IEEE Ultrasonic proximity switch form

This reference locates ultrasonic proximity switch in Autodesk's IEEE-oriented ultrasonic switches family. An ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle. The public library uses HPX1U 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: Ultrasonic. Autodesk IEEE Symbol Preview: Ultrasonic Switches, block HPX1U. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

Ultrasonic sensing is distinct from inductive, capacitive and optical sensing.

Full reference

HPX1U

IEC

Ultrasonic proximity switch

An ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle.

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

A distinction that matters

Ultrasonic sensing is distinct from inductive, capacitive and optical sensing.

Full reference

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