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Proceedings Paper

Moisture infrared sensor for medical applications
Author(s): Eric Monacelli; Yasser Alayli; Frederic Lofaso
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Paper Abstract

The importance of delivering warm, humidified air to patients ventilated through an endotracheal or tracheostomy tube is widely accepted. The use of modern artificial noses or heat and moisture exchangers made of recently developed material could be a solution to both problems of humidification and heat preservation. For this investigation, an IR optical sensor to measure weak partial pressure of water vapor has been designed and realized. This sensor is based on direct molecular absorption in the near IR corresponding to fundamental mode v1 and it is an extrinsic and amplitude modulation type. In the quasi-linear region between 0 to 30 mbars, the calibration curve that represents the transmited power versus the water vapor partial pressure in air shows a high sensitivity with a minimum detectable of 100 μbars. The experimental setup, test procedure, theory analysis, and data processing of the optical water vapor sensor will be described in this article. The sensor has been designed to monitor water vapor in the modern artificial noses.

Paper Details

Date Published: 18 April 2003
PDF: 4 pages
Proc. SPIE 5119, Bioengineered and Bioinspired Systems, (18 April 2003); doi: 10.1117/12.500126
Show Author Affiliations
Eric Monacelli, CNRS/Univ. de Versailles Saint-Quentin (France)
Yasser Alayli, CNRS/Univ. de Versailles Saint-Quentin (France)
Frederic Lofaso, Hopital Raymond Poincare (France)

Published in SPIE Proceedings Vol. 5119:
Bioengineered and Bioinspired Systems
Angel Rodriguez-Vazquez; Derek Abbott; Ricardo Carmona, Editor(s)

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