IEC 63041-1:2021 is available as IEC 63041-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 63041-1:2021 applies to piezoelectric sensors of resonator, delay-line and non-acoustic types, which are used in physical and engineering sciences, chemistry and biochemistry, medical and environmental sciences, etc. The purpose of this document is to specify the terms and definitions for piezoelectric sensors, and to make sure from a technological perspective that users understand the state-of-art piezoelectric sensors and how to use them correctly. This edition includes the following significant technical changes with respect to the previous edition:
- the new terms "piezoelectric sensor system" and "wireless SAW sensor system" and their definitions have been added;
- new types of sensor modules and sensor system have been added;
- some symbols of sensor elements are added in Clause 4;
- a new Figure B.3 has been added in Annex B;
- Annex C has been added.