Table of Contents
Sensors, Volume 18, Issue 12 (December 2018)
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Cover Story (view full-size image) Pupils’ health, performance, and well-being crucially depend on indoor environmental quality (IEQ), [...] Read more. Pupils’ health, performance, and well-being crucially depend on indoor environmental quality (IEQ), especially since schools are among the most densely occupied indoor areas. In this contribution, we present a wireless gas sensor network capable of monitoring IEQ in each room of a school in real-time. The sensor nodes use the Z-Wave protocol for communication and feature micro-machined temperature and humidity sensors to allow for determining thermal comfort. We use carbon dioxide as a tracer gas to gauge air quality and employ a miniaturized, low-cost, photoacoustic non-dispersive infrared absorption spectrometer to determine its concentration. The results obtained at a secondary school highlight the difficulty to maintain adequate IEQ levels in classrooms even when ventilating frequently, and that individual monitoring and control of rooms is required to combine energy savings and good IEQ. View this paper.