Diode laser measurements of HF concentrations from heptane/air pan fires extinguished by FE-36 and FE-36 plus ammonium polyphosphate

R. Reed Skaggs; Robert G. Daniel; Andrzej W. Miziolek; Kevin L. McNesby; Craig Herud; William R. Bolt; Donald Horton

doi:10.1117/12.337463

22 January 1999 Diode laser measurements of HF concentrations from heptane/air pan fires extinguished by FE-36 and FE-36 plus ammonium polyphosphate

R. Reed Skaggs, Robert G. Daniel, Andrzej W. Miziolek, Kevin L. McNesby, Craig Herud, William R. Bolt, Donald Horton

Author Affiliations +

Proceedings Volume 3535, Advanced Sensors and Monitors for Process Industries and the Environment; (1999) https://doi.org/10.1117/12.337463
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

Tunable diode laser absorption spectroscopy is used to measure the time evolution of hydrogen fluoride concentrations produce from a series of enclosed heptane/air pan fires extinguished by FE-36 or FE-36 plus ammonium polyphosphate (APP). Recent advances in room temperature fiber coupled, near-IR diode lasers provide isolation of the laser and signal processing electronics from the hostile sampling site. For the fires studied, the change in HF gas concentration with time is dependent upon the fire fighting chemical used to extinguish the fire. The presence of APP is observed to accelerate the dissipation of HF from the fire enclosure. Visible attenuation spectroscopy is also used to measure the amount of light attenuation that occurs as a hand held fire extinguisher containing powder fire fighting agents released in the crew space of a M1-Abrams land combat vehicle. Obscuration test demonstrate that release of APP from extinguishers in an occupied space does not present a visibility challenge to the vehicle personnel.

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R. Reed Skaggs, Robert G. Daniel, Andrzej W. Miziolek, Kevin L. McNesby, Craig Herud, William R. Bolt, and Donald Horton "Diode laser measurements of HF concentrations from heptane/air pan fires extinguished by FE-36 and FE-36 plus ammonium polyphosphate", Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); https://doi.org/10.1117/12.337463

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