IEC 62899-505:2020

IEC 62899-505 ®
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
Printed electronics –
Part 505: Quality assessment – Flexible gas sensor – Mechanical and thermal
testing
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IEC 62899-505 ®
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
Printed electronics –
Part 505: Quality assessment – Flexible gas sensor – Mechanical and thermal

testing
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.220.01 ISBN 978-2-8322-8490-2

– 2 – IEC 62899-505:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measurement of gas sensing performance . 7
4.1 General . 7
4.2 Standard environmental conditions . 7
4.2.1 Test gas . 7
4.2.2 Temperature . 7
4.2.3 Humidity . 7
4.2.4 Pressure . 7
4.2.5 Volume fraction of test gas . 7
4.3 Measurement procedure . 8
5 Mechanical test methods . 8
5.1 General . 8
5.2 Bending test . 9
5.2.1 General . 9
5.2.2 Test method . 9
5.2.3 Report of the results . 9
5.3 Torsion test . 9
5.3.1 General . 9
5.3.2 Test method . 9
5.3.3 Report of the results . 9
5.4 Stretching test . 10
5.4.1 General . 10
5.4.2 Test method . 10
5.4.3 Report of the results . 10
6 Thermal test methods . 10
6.1 General . 10
6.2 Test method . 10
6.2.1 Tolerances . 10
6.2.2 Conditioning . 11
6.2.3 Test cycle . 11
6.2.4 Performance measurement . 11
6.3 Severities . 12
6.4 Report of the results . 12
Bibliography . 13

Figure 1 – Example of gas sensing apparatus . 8
Figure 2 – Temperature cycle . 11

Table 1 – Upper temperature . 12
Table 2 – Lower temperature . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PRINTED ELECTRONICS –
Part 505: Quality assessment – Flexible gas sensor –
Mechanical and thermal testing

FOREWORD
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International Standard IEC 62899-505 has been prepared by IEC technical committee 119:
Printed Electronics.
The text of this International Standard is based on the following documents:
FDIS Report on voting
119/305/FDIS 119/309/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62899-505:2020 © IEC 2020
A list of all parts in the IEC 62899 series, published under the general title Printed electronics,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
There is an increasing worldwide demand for flexible and/or wearable gas sensors for fire
fighter’s garment, industrial workwear, wearable patch, etc. In recent years, many efforts have
been spent to develop and commercialize flexible and/or wearable gas sensors composed of
a flexible substrate, electrode, and gas sensing layer. These printed flexible gas sensors
should provide information about the level of gases in the surrounding environment regardless
of mechanical deformations, which might happen for a flexible movement. Further, the
surrounding temperature and humidity have a crucial effect on the performance of the gas
sensor, since the sensing parts face directly outwards to detect gaseous molecules. However,
these mechanical and thermal durabilities have been treated only to a minor extent. This
document helps to unify the testing and qualification of printed flexible gas sensors
manufactured usin
...