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  4. Multispectral Readout System for Detecting Tiny Color Changes of Gas Sensitive Colorimetric Dyes
 
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2020
Conference Paper
Title

Multispectral Readout System for Detecting Tiny Color Changes of Gas Sensitive Colorimetric Dyes

Abstract
We present a simple sensor setup for detecting very small color changes of gasochromic materials. The sensor includes up to ten LEDs for capturing different spectral channels, ranging from ultraviolet to the near infrared. In order to detect diminutive color changes of dyes at gas concentrations in the sub ppm range, the system includes a differential photodiode circuit, as well as two additional photodiodes to determine the absolute reflectance of the dyes.
Author(s)
Weber, Christian  orcid-logo
Fraunhofer-Institut für Physikalische Messtechnik IPM  
El-Safoury, Mahmoud  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Pannek, Carolin  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Engel, Laura  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Eberhardt, André  orcid-logo
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Bauersfeld, Marie-Luise  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Wöllenstein, Jürgen  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Mainwork
SMSI 2020 - Sensor and Measurement Science International  
Conference
Conference "Sensor and Measurement Science International" (SMSI) 2020  
Link
Link
DOI
10.5162/SMSI2020/P1.6
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • optical readout

  • colorimetric

  • gas sensor

  • carbon monoxide

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