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

• 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.
• Download:

  IMEKO-TC8-11-24-2025-008.pdf
• DOI:

  tc8-2025.008

Event details:

• IMEKO TC:

  TC8
• Event name:

  IMEKO TC8, TC11 and TC24 Conference
• Title:

  Joint conference of the TCs ‘Traceability in Metrology’ (IMEKO TC8), ‘Measurement in Testing, Inspection and Certification’ (IMEKO TC11), and ‘Chemical Measurements’ (IMEKO TC24).

• Place:

  Torino, ITALY
• Time:

  14 September 2025 - 17 September 2025