# Three-wire ultrasonic sensor

Canonical URL: https://eloragrid.ai/symbols/iec-three-wire-ultrasonic-sensor
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: HPX11U3
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Three-wire ultrasonic sensor
Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier.

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

## What it represents

This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction.
Identify supply, return and output from the selected device's terminal diagram.
Three wires do not determine whether the output is sourcing, sinking or a particular voltage.

## How to read it

- Identify supply, return and output from the selected device's terminal diagram.
- Three wires do not determine whether the output is sourcing, sinking or a particular voltage.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Identify supply, return and output from the selected device's terminal diagram.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

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

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: HPX11U3, HPX12U3 (Autodesk token; not a verified IEC database ID)
- Information added: Identify supply, return and output from the selected device's terminal diagram.
- Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic

## Public references

- [Autodesk IEC-60617 preview: Ultrasonic switch forms](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-06552B8C-FF75-458B-8761-548C5BCED3AA.htm) — Autodesk. Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.