Metrological traceability for measuring Indoor Air Quality using low-cost sensors

Ramona Russo, Francesca Rolle, Francesca Durbiano, Francesca Romana Pennecchi, Stefano Pavarelli, Michela Sega

Abstract

Indoor air quality (IAQ) monitoring has gained significant attention due to its impact on human health. Low-cost sensors allow widespread data collection but often lack proper characterisation and standard validation, affecting reliability. The Italian PRIN project "MIRABLE” - Measurement Infrastructure for Research on heAlthy and zero energy Buildings in novel Living lab Ecosystems - led by Italian National Metrology Institute, INRiM, and Politecnico di Torino, aims to develop a measurement infrastructure for monitoring multi-domain indoor environmental conditions using low-cost sensors. In this framework INRiM started activities on the metrological characterization of low-cost sensors for CO2, CO, NOX. For CO₂ sensors, a calibration system using reference gas mixtures ensures metrological traceability, employing a primary reference analyser based on non-dispersive infrared spectroscopy. Exploratory findings and preliminary results with CO2 sensors are detailed in this work and a similar approach is planned for CO and NOX sensors.

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IMEKO-TC8-11-24-2025-008.pdf

DOI

10.21014/tc8-2025.008

IMEKO TC

TC8 - Traceability in Metrology

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