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Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia
Anthropogenic emissions of ammonia to the atmosphere, particularly those from agricultural sources, can be damaging to the environment and human health and can drive a need for sensor technologies that can be used to detect and quantify the emissions. Mobile sensing approaches that can be deployed o...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385541/ https://www.ncbi.nlm.nih.gov/pubmed/37514791 http://dx.doi.org/10.3390/s23146498 |
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author | Shadman, Soran Miller, Thomas W. Yalin, Azer P. |
author_facet | Shadman, Soran Miller, Thomas W. Yalin, Azer P. |
author_sort | Shadman, Soran |
collection | PubMed |
description | Anthropogenic emissions of ammonia to the atmosphere, particularly those from agricultural sources, can be damaging to the environment and human health and can drive a need for sensor technologies that can be used to detect and quantify the emissions. Mobile sensing approaches that can be deployed on ground-based or aerial vehicles can provide scalable solutions for high throughput measurements but require relatively compact and low-power sensor systems. This contribution presents an ammonia sensor based on wavelength modulation spectroscopy (WMS) integrated with a Herriott multi-pass cell and a quantum cascade laser (QCL) at 10.33 µm oriented to mobile use. An open-path configuration is used to mitigate sticky-gas effects and achieve high time-response. The final sensor package is relatively small (~20 L), lightweight (~3.5 kg), battery-powered (<30 W) and operates autonomously. Details of the WMS setup and analysis method are presented along with laboratory tests showing sensor accuracy (<~2%) and precision (~4 ppb in 1 s). Initial field deployments on both ground vehicles and a fixed-wing unmanned aerial vehicle (UAV) are also presented. |
format | Online Article Text |
id | pubmed-10385541 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-103855412023-07-30 Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia Shadman, Soran Miller, Thomas W. Yalin, Azer P. Sensors (Basel) Article Anthropogenic emissions of ammonia to the atmosphere, particularly those from agricultural sources, can be damaging to the environment and human health and can drive a need for sensor technologies that can be used to detect and quantify the emissions. Mobile sensing approaches that can be deployed on ground-based or aerial vehicles can provide scalable solutions for high throughput measurements but require relatively compact and low-power sensor systems. This contribution presents an ammonia sensor based on wavelength modulation spectroscopy (WMS) integrated with a Herriott multi-pass cell and a quantum cascade laser (QCL) at 10.33 µm oriented to mobile use. An open-path configuration is used to mitigate sticky-gas effects and achieve high time-response. The final sensor package is relatively small (~20 L), lightweight (~3.5 kg), battery-powered (<30 W) and operates autonomously. Details of the WMS setup and analysis method are presented along with laboratory tests showing sensor accuracy (<~2%) and precision (~4 ppb in 1 s). Initial field deployments on both ground vehicles and a fixed-wing unmanned aerial vehicle (UAV) are also presented. MDPI 2023-07-18 /pmc/articles/PMC10385541/ /pubmed/37514791 http://dx.doi.org/10.3390/s23146498 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Shadman, Soran Miller, Thomas W. Yalin, Azer P. Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title | Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title_full | Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title_fullStr | Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title_full_unstemmed | Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title_short | Open-Path Laser Absorption Sensor for Mobile Measurements of Atmospheric Ammonia |
title_sort | open-path laser absorption sensor for mobile measurements of atmospheric ammonia |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385541/ https://www.ncbi.nlm.nih.gov/pubmed/37514791 http://dx.doi.org/10.3390/s23146498 |
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