SIST EN IEC 62127-3:2023/A1:2026

Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields (IEC 62127-3:2022/AMD1:2026)

Ultraschall - Hydrophone - Teil 3: Eigenschaften von Hydrophonen zur Verwendung in Ultraschallfeldern (IEC 62127-3:2022/AMD1:2026)

Ultrasons - Hydrophones - Partie 3: Propriétés des hydrophones pour les champs ultrasoniques (IEC 62127-3:2022/AMD1:2026)

Ultrazvok - Hidrofoni - 3. del: Lastnosti hidrofonov za ultrazvočna polja - Dopolnilo A1 (IEC 62127-3:2022/AMD1:2026)

General Information

• Status: Published
• Public Enquiry End Date: 31-Jul-2025
• Publication Date: 29-Apr-2026
• ICS: 11.040.01 - Medical equipment in general
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Apr-2026
• Due Date: 20-Jun-2026
• Completion Date: 30-Apr-2026
• Ref Project: EN IEC 62127-3:2023/A1:2026 - Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields

Relations

• Refers: SIST EN IEC 62127-2:2025 - Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields (IEC 62127-2:2025)
• Effective Date: 24-Mar-2026
• Amends: SIST EN IEC 62127-3:2023 - Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields (IEC 62127-3:2022)
• Effective Date: 01-Jun-2026

Overview

SIST EN IEC 62127-3:2023/A1:2026, developed by CLC and aligned with IEC 62127-3:2022/AMD1:2026, sets out requirements and recommendations for the properties of hydrophones used specifically in the measurement of ultrasonic fields. This key amendment addresses improvements and clarifications on measurement procedures for directional responses, data evaluation for hydrophone size, and criteria for sensitivity and frequency response reporting.

Hydrophones are crucial electroacoustic sensors designed to measure acoustic pressure in fluids, widely used in medical ultrasonics and industrial ultrasonic applications. This European standard ensures reliable and comparable measurements of hydrophone properties to support precision in ultrasonic testing, research, and device calibration.

Key Topics

• Hydrophone Sensitivity
  The standard specifies that the sensitivity of hydrophones must be related to a particular water temperature. It should also, where practical, include the temperature dependence of sensitivity over typical laboratory ranges (19 °C to 25 °C). This helps in accounting for temperature-induced variability in hydrophone output, which is important for accurate measurement.

• Frequency Response Criteria
  Frequency response of hydrophones should be reported as a list of values. A graphical representation may be provided in addition. This ensures clarity and uniformity in characterizing how hydrophones respond to varying ultrasonic frequencies.

• Directional Response
  The amendment clarifies the angular increment required in sensitivity measurements:

  • No more than 1 dB change between adjacent points is required for frequencies up to 20 MHz.
  • At higher frequencies, a larger variation may be accepted for practicality. These requirements enhance reproducibility and reduce measurement burdens, promoting common data sets for spatial averaging correction methods.

• Hydrophone Size Modeling
  The standard reinforces the use of default models (e.g., rigid baffle piston) for determining effective hydrophone size, especially for circular elements. However, it allows alternative models where justified, which supports advanced research needs.

• Reporting Requirements
  Annexes provide practical guidance on presenting hydrophone property data and give example tables for sensitivity and frequency response.

Applications

• Medical Ultrasound Equipment Calibration
  Compliance with SIST EN IEC 62127-3:2023/A1:2026 helps in the precise calibration of ultrasound devices for medical diagnostics and therapy by ensuring hydrophones provide accurate and reliable field measurements.

• Industrial Ultrasonic Inspections
  Used for non-destructive testing, hydrophones characterized under this standard help to assess material properties and detect flaws in manufacturing or maintenance scenarios.

• Scientific Research
  Researchers depend on standardized hydrophone measurements to compare results across studies and develop new acoustic measurement techniques.

• Quality Assurance for Hydrophone Manufacturers
  Manufacturers gain clear criteria for documentation and reporting, ensuring their instruments meet international benchmarks and are suitable for regulated environments.

Related Standards

• EN IEC 62127-2
  Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields establishes calibration methods that complement the property specifications in Part 3.

• IEC 62127-1
  General requirements for hydrophones in ultrasonic fields, providing the overarching framework for hydrophone use and evaluation.

• Other Related Documents

  • IEEE standards on hydrophone measurement for biomedical applications.
  • Metrologia and IEEE articles listed in the bibliography for further scientific context.

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By following the procedures and criteria in SIST EN IEC 62127-3:2023/A1:2026, users ensure that hydrophone measurements are standardized, facilitating high-quality, repeatable results across medical, industrial, and research applications involving ultrasonics.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2026
Ultrazvok - Hidrofoni - 3. del: Lastnosti hidrofonov za ultrazvočna polja - Dopolnilo
A1 (IEC 62127-3:2022/AMD1:2026)
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields (IEC
62127-3:2022/AMD1:2026)
Ultraschall - Hydrophone - Teil 3: Eigenschaften von Hydrophonen zur Verwendung in
Ultraschallfeldern (IEC 62127-3:2022/AMD1:2026)
Ultrasons - Hydrophones - Partie 3: Propriétés des hydrophones pour les champs
ultrasoniques (IEC 62127-3:2022/AMD1:2026)
Ta slovenski standard je istoveten z: EN IEC 62127-3:2023/A1:2026
ICS:
11.040.01 Medicinska oprema na Medical equipment in general
splošno
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62127-3:2023/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM April 2026
ICS 17.140.50
English Version
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones
for ultrasonic fields
(IEC 62127-3:2022/AMD1:2026)
Ultrasons - Hydrophones - Partie 3: Propriétés des Ultraschall - Hydrophone - Teil 3: Eigenschaften von
hydrophones pour les champs ultrasoniques Hydrophonen zur Verwendung in Ultraschallfeldern
(IEC 62127-3:2022/AMD1:2026) (IEC 62127-3:2022/AMD1:2026)
This amendment A1 modifies the European Standard EN IEC 62127-3:2023; it was approved by CENELEC on 2026-03-31. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62127-3:2023/A1:2026 E

European foreword
The text of document 87/897/CDV, future edition 2 of IEC 62127-3/AMD1, prepared by TC 87
"Ultrasonics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-04-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-04-30
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62127-3:2022/AMD1:2026 was approved by CENELEC as
a European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Replace IEC 62127-2 with:
Publication Year Title EN/HD Year
IEC 62127-2 - Ultrasonics - Hydrophones - Part 2: EN IEC 62127-2 -
Calibration for ultrasonic fields

IEC 62127-3 ®
Edition 2.0 2026-02
INTERNATIONAL
STANDARD
AMENDMENT 1
Ultrasonics - Hydrophones -
Part 3: Properties of hydrophones for ultrasonic fields
ICS 17.140.50  ISBN 978-2-8327-1069-2

IEC 62127-3:2022-12/AMD1:2026-02(en)

IEC 62127-3:2022/AMD1:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Ultrasonics - Hydrophones -
Part 3: Properties of hydrophones for ultrasonic fields

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 62127-2:2022 has been prepared by IEC technical committee 87:
Ultrasonics.
The text of this Amendment is based on the following documents:
Draft Report on voting
87/897/CDV 87/914/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
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