# ANSI/IEEE Ultrasonic proximity switch form Canonical URL: https://eloragrid.ai/symbols/ansi-ultrasonic-proximity-switch Publisher: Elora Grid Updated: 2026-10-28 Lookup label: HPX1U Drawing use: Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: 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. Related representation: [Ultrasonic proximity switch](https://eloragrid.ai/symbols/iec-ultrasonic-proximity-switch) IEEE-library form of ultrasonic proximity switch: an ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle. ## In plain English ### What does ANSI/IEEE Ultrasonic proximity switch form mean? 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. ### A simple example Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence. ### What the drawings help you do State the sensing role, output type and selected device connection separately. Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. State the sensing role, output type and selected device connection separately. Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ### This particular reference IEEE-library form of ultrasonic proximity switch: an ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle. Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. ### Terms - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Terminal: An identified point where a conductor connects. - Signal: Electrical information passed between devices, rather than necessarily the main power supply. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview: Ultrasonic Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm) ## What it represents 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. Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence. State the sensing role, output type and selected device connection separately. Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. State the sensing role, output type and selected device connection separately. Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ## How to read it - State the sensing role, output type and selected device connection separately. - Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. ## Information to show or reference - Identify the associated device, circuit or diagram boundary. - State the sensing role, output type and selected device connection separately. - Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form. ## Important distinction Ultrasonic sensing is distinct from inductive, capacitive and optical sensing. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Ultrasonic Switches; published form: Ultrasonic. - Public vendor block: HPX1U. Vendor library token, not an IEEE symbol number. - Information added: State the sensing role, output type and selected device connection separately. - Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview: Ultrasonic Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm) — Autodesk. Public IEEE-oriented Ultrasonic Switches table explicitly lists HPX1U as Ultrasonic. This supports the vendor convention context, not reproduction of the publisher graphic. ## 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.