SIST-TS CEN/TS 17660-2:2025

SLOVENSKI STANDARD
01-januar-2025
Kakovost zraka - Vrednotenje lastnosti senzorskih sistemov za kakovost zraka - 2.
del: Delci v zunanjem zraku
Air quality - Performance evaluation of air quality sensor systems - Part 2: Particulate
matter in ambient air
Luftbeschaffenheit - Leistungsbewertung von Luftqualitätssensorsystemen - Teil 2:
Partikelförmige Stoffe in der Außenluft
Qualité de l'air - Évaluation des performances des systèmes capteurs de la qualité de
l'air - Partie 2 : Particules dans l'air ambiant
Ta slovenski standard je istoveten z: CEN/TS 17660-2:2024
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17660-2
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
December 2024
TECHNISCHE SPEZIFIKATION
ICS 13.040.20
English Version
Air quality - Performance evaluation of air quality sensor
systems - Part 2: Particulate matter in ambient air
Qualité de l'air - Évaluation des performances des Luftbeschaffenheit - Leistungsbewertung von
systèmes capteurs de la qualité de l'air - Partie 2 : Luftqualitätssensorsystemen - Teil 2: Partikelförmige
Particules dans l'air ambiant Stoffe in der Außenluft
This Technical Specification (CEN/TS) was approved by CEN on 6 October 2024 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17660-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 10
5 Principle of the evaluation . 13
6 Performance requirements . 17
7 General requirements for the performance of tests . 19
8 Laboratory tests of sensor system . 19
9 Field tests . 21
10 Classification based on the test results . 31
11 Test report . 32
Annex A (informative) Co-location of sensor systems, deployment and management of a
network of sensor systems . 36
A.1 Background . 36
A.2 Co-location and deployment . 36
A.2.1 Individual sensor systems . 36
A.2.2 Sensor networks . 37
A.3 Calibration and validation of networks . 39
Annex B (informative) Evaluation of the effect of electromagnetic fields on the sensor system
measurements . 40
Annex C (informative) Air composition in different outdoor type of sites . 41
Annex D (informative)  Selecting the climate for a field trial site . 45
Annex E (normative) Ordinary least square regression formulae . 47
(informative) Values for u bs, RM . 49
( )
Annex F (informative) Example of field tests for the classification process. 52
Annex G (informative) PM testing chamber design for validating coarse particle
measurements . 54
Bibliography. 55

European foreword
This document (CEN/TS 17660-2:2024) has been prepared by Technical Committee CEN/TC 264 “Air
quality”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
CEN/TS 17660, Air quality — Performance evaluation of air quality sensor systems consists of the following
parts:
— Part 1: Gaseous pollutants in ambient air
— Part 2: Particulate matter in ambient air
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
Sensor systems are generally seen as emerging measuring devices for the monitoring of air quality.
Sensor systems provide a fast and low-cost complement to the reference and equivalent measurement
methods as defined in Directive 2008/50/EC on ambient air quality and cleaner air for Europe [1]. Sensor
systems could allow for air pollution monitoring at a lower cost and with a higher spatial density than
with the reference and equivalent measurement methods. They also allow for new air pollution
applications including monitoring in complex topographies, at traffic junctions, in street canyons, at
remote sites, on mobile platforms (pedestrians, cyclists, vehicles, trams) and for citizen science studies,
e.g. monitoring around areas of local concern, schools, or parks.
Sensor systems use one or more low-cost sensors that are based on several technologies. However,
sensor systems share two common features, portability and low-cost, compared with traditional
reference or equivalent measurement methods. Typically, sensor systems can continuously monitor air
pollution with fast response times ranging from a few tens of seconds to a few minutes.
Currently, the use of sensor systems for air quality monitoring is limited by the low accuracy of
measurements that they can achieve. Additionally, there was no unambiguous protocol for evaluating
sensor systems with a structured metrological approach, ensuring traceability from sensor system
measurements to national and international standards. A protocol will enable exhaustive and transparent
evaluation of sensor systems that can be an important step towards including sensor system
measurements into the monitoring of air quality for regulatory and non-regulatory purposes.
The protocol in this document applies to sensor systems and supports the requirements of Directive
2008/50/EC. This procedure evaluates whether the measurement uncertainty of the sensor system
meets the data quality objectives defined in Directive 2008/50/EC for indicative measurements. This
protocol also allows for a less demanding evaluation of the performance of sensor systems for non-
regulatory measurements.
This document defines common procedures and requirements for the evaluation of the performance of
sensor systems to facilitate mutual recognition by the relevant bodies or stakeholders and thereby
minimise both administrative and cost burdens on manufacturers. It does not describe the roles and
responsibilities of manufacturers, test laboratories and relevant bodies under these procedures.
1 Scope
This document specifies the general principles, including testing procedures and requirements, for the
classification of performance of low-cost sensor systems for the monitoring of particulate matter in
ambient air at fixed sites. The classification of sensor systems includes tests that are performed under
prescribed conditions. It does not guarantee performance in locations that are different from the tests,
variations in meteorological climate from the test programme or account for stability over time, which
can only be assessed under ongoing quality control strategies.
The described procedure is applicable to the determination of the mass concentration of particulate
matter. The pollutants that are considered in this document are PM and PM in the range of
10 2,5
concentrations expected in ambient air.
This document provides a classification that is consistent with the requirements for indicative
measurements and objective estimation defined in Directive 2008/50/EC. In addition, it provides a
classification for applications (non-regulatory measurements) that require more relaxed performance
criteria.
This document applies to sensor systems used as individual systems. It does not apply to sensor systems
as part of a sensor network. However, for some applications (e.g. in cities) sensor systems are deployed
as part of a sensor network. Annex A provides information on the use of sensor systems as nodes in a
sensor network.
2 Normative references
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.
EN 15267-1, Air quality - Assessment of air quality monitoring equipment - Part 1: General principles of
certification
EN 15267-2, Air quality - Assessment of air quality monitoring equipment - Part 2: Initial assessment of the
manufacturer’s quality management system and post certification surveillance for the manufacturing
process
EN 16450, Ambient air — Automated measuring systems for the measurement of the concentration of
particulate matter (PM10; PM2,5)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp/
3.1
ambient air
outdoor air in the troposphere where provisions concerning health and safety at work apply and to which
members of the public do not have regular access
Note 1 to entry: This does not include workplaces as defined by Directive 89/654/EC [2].
[SOURCE: Directive 2008/50/EC] [1]
3.2
averaging period
period of time for which a limit value is associated
Note 1 to entry: For this document, the averaging period is defaulted to 24 h unless otherwise specified (more
information can be found in Directive 2008/50/EC).
...