Nonsampling and minimum sampling infrared gas analysis

R. J. Hutchinson

doi:10.1117/12.22307

1 October 1990 Nonsampling and minimum sampling infrared gas analysis

R. J. Hutchinson

Proceedings Volume 1320, Infrared Technology and Applications; (1990) https://doi.org/10.1117/12.22307
Event: Eighth International Conference Infrared Technology and Applications, 1990, London, United Kingdom

Abstract

Infrared gas analysis has been in use as an industrial process for decades. Normally the gas is sampled from the stack and conveyed to an analyser system. As this requires the gas to be extracted, filtered and cooled to remove condensates, other methods have been developed. These include across-stack gas analysis where an infrared transmitter is placed on one side of the stack and a receiver on the other side. As there is now no need to remove gas from the stack, there are advantages of simplicity and avoidance of loss of soluble gases with the condensate. However, it is not possible to do span and zero tests with the across-stack gas analyser as the measuring path is open. A method which combines the advantages of across-stack and extractive gas analysis is the in-situ gas analyser. In this instrument, a probe is in the stack which fills with stack gas because it is made out of a porous material. This probe has an infrared beam of suitable wavelengths inside. The high quality rigid path compensates for the fact that it is a shorter path than the across-stack gas analyser. The overriding advantage is that zero and span gases can be introduced as they can flush out the porous sampling tube. However, all the advantages of non-sampling are maintained and this method allows the accurate analysis of soluble gases such as NO2, SO2 and NH3.

Citation Download Citation

R. J. Hutchinson "Nonsampling and minimum sampling infrared gas analysis", Proc. SPIE 1320, Infrared Technology and Applications, (1 October 1990); https://doi.org/10.1117/12.22307

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
1 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Infrared radiation

Gases

NOx

Receivers

Statistical analysis

Transmitters

Analytics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years