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quality sensor systems for gaseous pollutants and for particulate pollutants in ambient air. This shall be done by undertaking the pre-normative work that is required before the definition of a standard by CEN.Identificatorul procedurii: 4b17f01a-8d90-4674-b0f5-101dab3fb1a2Identificator intern: EC-ENV/2024/OP/0047Tip de procedură: Deschisă2.1.1. ScopNatura contractului: ServiciiClasificarea principală (cpv): 90700000 Servicii privind mediul2.1.3. ValoareValoarea estimată fără TVA: 900 000,00 EUR2.1.4. Informații generaleInformații suplimentare: In case of unavailability or disruptions in the functioning of the electronic means of communication provided in Section 5.1.11 in the last 5 calendar days before the time limit for receipt indicated in Section 5.1.12, the contracting authority reserves the right to extend this time limit and publish the extension at the Internet address provided in Section 5.1.11, without a preceding publication of a corrigendum to this notice. Economic operators interested in this procurement are invited to subscribe to the call for tenders at the address in Section 5.1.11 in order to get notified when new information or documents are publi