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Sensors 2012, 12(6), 8176-8192; doi:10.3390/s120608176
Article

Long-Term Outdoor Reliability Assessment of a Wireless Unit for Air-Quality Monitoring Based on Nanostructured Films Integrated on Micromachined Platforms

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Received: 15 March 2012; in revised form: 31 May 2012 / Accepted: 8 June 2012 / Published: 13 June 2012
(This article belongs to the Section Physical Sensors)
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Abstract: We have fabricated and tested in long-term field operating conditions a wireless unit for outdoor air quality monitoring. The unit is equipped with two multiparametric sensors, one miniaturized thermo-hygrometer, front-end analogical and digital electronics, and an IEEE 802.15.4 based module for wireless data transmission. Micromachined platforms were functionalized with nanoporous metal-oxides to obtain multiparametric sensors, hosting gas-sensitive, anemometric and temperature transducers. Nanoporous metal-oxide layer was directly deposited on gas sensing regions of micromachined platform batches by hard-mask patterned supersonic cluster beam deposition. An outdoor, roadside experiment was arranged in downtown Milan (Italy), where one wireless sensing unit was continuously operated side by side with standard gas chromatographic instrumentation for air quality measurements. By means of a router PC, data from sensing unit and other instrumentation were collected, merged, and sent to a remote data storage server, through an UMTS device. The whole-system robustness as well as sensor dataset characteristics were continuously characterized over a run-time period of 18 months.
Keywords: gas sensors; metal-oxides; nanomaterials; micromachining; air monitoring; wireless network gas sensors; metal-oxides; nanomaterials; micromachining; air monitoring; wireless network
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Leccardi, M.; Decarli, M.; Lorenzelli, L.; Milani, P.; Mettala, P.; Orava, R.; Barborini, E. Long-Term Outdoor Reliability Assessment of a Wireless Unit for Air-Quality Monitoring Based on Nanostructured Films Integrated on Micromachined Platforms. Sensors 2012, 12, 8176-8192.

AMA Style

Leccardi M, Decarli M, Lorenzelli L, Milani P, Mettala P, Orava R, Barborini E. Long-Term Outdoor Reliability Assessment of a Wireless Unit for Air-Quality Monitoring Based on Nanostructured Films Integrated on Micromachined Platforms. Sensors. 2012; 12(6):8176-8192.

Chicago/Turabian Style

Leccardi, Matteo; Decarli, Massimiliano; Lorenzelli, Leandro; Milani, Paolo; Mettala, Petteri; Orava, Risto; Barborini, Emanuele. 2012. "Long-Term Outdoor Reliability Assessment of a Wireless Unit for Air-Quality Monitoring Based on Nanostructured Films Integrated on Micromachined Platforms." Sensors 12, no. 6: 8176-8192.


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