Full Content is available to subscribers

Subscribe/Learn More  >

Comparison of Temperature Measurements in Fire Test Furnaces Using Aspirated Thermocouples

[+] Author Affiliations
John H. Mammoser, III, Aldo Jimenez

Underwriters Laboratories, Inc., Northbrook, IL

Paper No. HT2005-72548, pp. 695-699; 5 pages
  • ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
  • Heat Transfer: Volume 1
  • San Francisco, California, USA, July 17–22, 2005
  • Conference Sponsors: Heat Transfer Division and Electronic and Photonic Packaging Division
  • ISBN: 0-7918-4731-4 | eISBN: 0-7918-3762-9
  • Copyright © 2005 by ASME


There are numerous thermocouple types which are used to measure temperature in experimental fire environments including bare bead, plate, sheathed (grounded and ungrounded) and aspirated thermocouples (suction pyrometers). Furnaces used to test fire resistive construction, as specified in the Standards ANSI/UL 263, ASTM E119 and NFPA 251 employ sheathed, ungrounded thermocouples to measure gas temperatures, while room fire experiments, such as ASTM E603-01, employ bare bead and aspirated thermocouples to measure hot gas temperature layers. Shielded, aspirated thermocouples are quite inexpensive and easy to make, however, the suction needed to create velocities in excess of 10 m/s at the tip is quite a difficult challenge. A commonly used method to create suction includes multiple gas traps to cool and dehumidify the hot gas before passing through a pump rated for high temperatures. This method can be costly, time consuming to maintain and cannot operate for multiple hours at high temperature without damaging the pump. An investigation has been undertaken to determine a cost effective method to measure gas temperatures in fire test furnaces for long durations at high temperatures. A comparison of bear bead, plate and double shielded, aspirated thermocouples will be presented. A low cost, durable aspirated thermocouple will be shown to continuously endure temperatures in excess of 1040°C for multiple hours.

Copyright © 2005 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In