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Related Experiment Videos

Personal ammonia sensor for industrial environments.

C Malins1, A Doyle, B D MacCraith

  • 1Department of Instrumentation and Analytical Science, UMIST, Manchester, UK M60 1QD. chris.malins@umist.ac.uk

Journal of Environmental Monitoring : JEM
|September 1, 2001
PubMed
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A new opto-chemical ammonia sensor uses a cyanine dye in glass for personal monitoring. It offers fast, reversible detection of ammonia in the 5-100 ppm range, with minimal cross-sensitivity.

Area of Science:

  • Chemical sensors
  • Materials science
  • Optoelectronics

Background:

  • Ammonia (NH3) is a key industrial chemical and a potential environmental/health hazard.
  • Personal monitoring requires sensitive, selective, and rapid detection methods.
  • Existing ammonia sensors often lack portability or speed for real-time personal use.

Purpose of the Study:

  • To develop a compact, opto-chemical sensor for ammonia detection.
  • To enable real-time personal monitoring of ammonia concentrations.
  • To evaluate sensor performance, including sensitivity, response time, and cross-sensitivity.

Main Methods:

  • Fabrication of sensor platforms with cyanine dye immobilized in microporous glass thin films.
  • Integration of embossed grating couplers for compact optical design and waveguiding.

Related Experiment Videos

  • Testing sensor response to ammonia in the 5-100 ppm range and assessing cross-sensitivity to water and other interferents.

    • Main Results:

    • The developed sensor exhibits reversible ammonia sensitivity within the 5-100 ppm range.
    • Rapid response times of under 2 minutes were achieved for ammonia detection.
    • The sensor's cross-sensitivity to water and other potential interferents was evaluated.

    Conclusions:

    • The opto-chemical sensor is suitable for personal monitoring tasks.
    • The sensor design offers a compact optical solution with effective waveguiding.
    • The sensor demonstrates promising performance for real-time ammonia detection.