Photonic Sensors

, Volume 6, Issue 2, pp 107–114 | Cite as

A low-cost, portable optical sensing system with wireless communication compatible of real-time and remote detection of dissolved ammonia

  • Shijie DengEmail author
  • William Doherty
  • Michael AP McAuliffe
  • Urszula Salaj-Kosla
  • Liam Lewis
  • Guillaume Huyet
Open Access


A low-cost and portable optical chemical sensor based ammonia sensing system that is capable of detecting dissolved ammonia up to 5 ppm is presented. In the system, an optical chemical sensor is designed and fabricated for sensing dissolved ammonia concentrations. The sensor uses eosin as the fluorescence dye which is immobilized on the glass substrate by a gas-permeable protection layer. A compact module is developed to hold the optical components, and a battery powered micro-controller system is designed to read out and process the data measured. The system operates without the requirement of laboratory instruments that makes it cost effective and highly portable. Moreover, the calculated results in the system can be transmitted to a PC wirelessly, which allows the remote and real-time monitoring of dissolved ammonia.


Ammonia sensing optical chemical sensor portable optical sensing system remote sensing 


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Copyright information

© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Shijie Deng
    • 1
    Email author
  • William Doherty
    • 2
  • Michael AP McAuliffe
    • 1
  • Urszula Salaj-Kosla
    • 3
  • Liam Lewis
    • 1
  • Guillaume Huyet
    • 1
    • 2
  1. 1.Centre for Advanced Photonics & Process AnalysisCork Institute of Technology and Tyndall National InstituteCorkIreland
  2. 2.Department of Physical ScienceCork Institute of TechnologyCorkIreland
  3. 3.Department of Chemical and Environmental ScienceUniversity of LimerickLimerickIreland

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