Inspectioneering Journal

Furnace Temperature Measurement Techniques

Using An Infrared Thermal Imager: A Practical Approach

By Mark Badrick, Senior Reliability Engineer at Bahrain Petroleum Company. This article appears in the January/February 1998 issue of Inspectioneering Journal.

The use of Infrared Thermal Imagers, particularly for temperature measurement within an operating furnace environment, is reliant on the accurate evaluation of specific parameters, which the pyrometer requires in order to produce true temperature measurements.

The measurement of furnace tube temperatures presents specific problems which may detract from the precision of temperatures measurements. Images for temperature measurement within an operating furnace environment, are reliant upon the accurate evaluation of the target's emissivity and the reflected ambient radiation. Both parameters being manually entered into the pyrometer.

These parameters are an essential requirement if we are to achieve a true target temperature, but their exact values are quite impossible to determine. The following discussion is an attempt to qualify this statement.

This content is available to registered users and subscribers

Register today to unlock this article for free.

Create your free account and get access to:

  • Unlock one premium article of your choosing per month
  • Exclusive online content, videos, and downloads
  • Insightful and actionable webinars
Interested in unlimited access? VIEW OUR SUBSCRIPTION OPTIONS

Current subscribers and registered users can log in now.

Comments and Discussion

Posted by Davide Lanzoni on March 10, 2014
Good paper, but cannot see the images Log in or register to read the rest of this comment.

Posted by Scott McArthur on September 14, 2023
I couldn't find the referenced thermograms in the... Log in or register to read the rest of this comment.

Add a Comment

Please log in or register to participate in comments and discussions.

Inspectioneering Journal

Explore over 20 years of articles written by our team of subject matter experts.

Company Directory

Find relevant products, services, and technologies.

Training Solutions

Improve your skills in key mechanical integrity subjects.

Case Studies

Learn from the experience of others in the industry.


Inspectioneering's index of mechanical integrity topics – built by you.

Industry News

Stay up-to-date with the latest inspection and asset integrity management news.


Read short articles and insights authored by industry experts.

Expert Interviews

Inspectioneering's archive of interviews with industry subject matter experts.

Event Calendar

Find upcoming conferences, training sessions, online events, and more.


Downloadable eBooks, Asset Intelligence Reports, checklists, white papers, and more.

Videos & Webinars

Watch educational and informative videos directly related to your profession.


Commonly used asset integrity management and inspection acronyms.