Fiber optic and portable instruments for ammonia sensing in field operating conditions

Radislav A. Potyrailo

doi:10.1117/12.166276

31 December 1993 Fiber optic and portable instruments for ammonia sensing in field operating conditions

Radislav A. Potyrailo

Proceedings Volume 2069, Optical Methods for Chemical Process Control; (1993) https://doi.org/10.1117/12.166276
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

Polymer dye films incorporating a pH indicator, immobilized on a polymer support, can be used for ammonia gas (NH₃) sensing in fiber optic and portable instruments in the field operating conditions with changing temperature and humidity. Experimental results on the NH₃ detection in the range 0 - 100 mg/m³ are reported for the range of temperature 25 - 45 degree(s)C and 60 - 80% relative humidity. A model of steady-state instrument response in the field has been developed with four adjustable parameters to describe the coupling of ambient NH₃ concentration to absorbance change of the sensing element. Practical problems associated with the applications of such sensing chemistry for NH₃ monitoring in the field are discussed.

Citation Download Citation

Radislav A. Potyrailo "Fiber optic and portable instruments for ammonia sensing in field operating conditions", Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); https://doi.org/10.1117/12.166276

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