Suitability of Low-Cost Sensors for Submicron Aerosol Particle Measurement

IF 3.8 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS
D. Stoll, M. Kerner, Simon Paas, S. Antonyuk
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Abstract

The measurement and assessment of indoor air quality in terms of respirable particulate constituents is relevant, especially in light of the COVID-19 pandemic and associated infection events. To analyze indoor infectious potential and to develop customized hygiene concepts, the measurement monitoring of the anthropogenic aerosol spreading is necessary. For indoor aerosol measurements usually standard lab equipment is used. However, these devices are time-consuming, expensive and unwieldy. The idea is to replace this standard laboratory equipment with low-cost sensors widely used for monitoring fine dust (particulate matter—PM). Due to the low acquisition costs, many sensors can be used to determine the aerosol load, even in large rooms. Thus, the aim of this work is to verify the measurement capability of low-cost sensors. For this purpose, two different models of low-cost sensors are compared with established laboratory measuring instruments. The study was performed with artificially prepared NaCl aerosols with a well-defined size and morphology. In addition, the influence of the relative humidity, which can vary significantly indoors, on the measurement capability of the low-cost sensors is investigated. For this purpose, a heating stage was developed and tested. The results show a discrepancy in measurement capability between low-cost sensors and laboratory measuring instruments. This difference can be attributed to the partially different measuring method, as well as the different measuring particle size ranges. The determined measurement accuracy is nevertheless good, considering the compactness and the acquisition price of the low-cost sensors.
低成本传感器在亚微米气溶胶粒子测量中的适用性
根据可吸入颗粒物成分对室内空气质量进行测量和评估是相关的,特别是考虑到新冠肺炎大流行和相关感染事件。为了分析室内感染潜力并制定个性化的卫生概念,有必要对人为气溶胶传播进行测量监测。对于室内气溶胶测量,通常使用标准实验室设备。然而,这些设备耗时、昂贵且笨重。其想法是用广泛用于监测细尘(颗粒物PM)的低成本传感器取代这种标准实验室设备。由于采集成本低,即使在大房间中,也可以使用许多传感器来确定气溶胶负荷。因此,这项工作的目的是验证低成本传感器的测量能力。为此,将两种不同型号的低成本传感器与已建立的实验室测量仪器进行了比较。这项研究是用人工制备的具有明确尺寸和形态的NaCl气溶胶进行的。此外,还研究了室内相对湿度的变化对低成本传感器测量能力的影响。为此,开发并测试了加热阶段。结果表明,低成本传感器和实验室测量仪器之间的测量能力存在差异。这种差异可归因于部分不同的测量方法,以及不同的测量粒度范围。然而,考虑到低成本传感器的紧凑性和获取价格,所确定的测量精度是好的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Applied System Innovation
Applied System Innovation Mathematics-Applied Mathematics
CiteScore
7.90
自引率
5.30%
发文量
102
审稿时长
11 weeks
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