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American Institute of Physics, Review of Scientific Instruments, 6(74), p. 3151-3154, 2003

DOI: 10.1063/1.1570949

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A compact, lightweight gas standards generator for permeation tubes

Journal article published in 2003 by Washenfelder Ra, R. A. Washenfelder ORCID, C. M. Roehl, K. A. McKinney, R. R. Julian, P. O. Wennberg
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A lightweight, compact gas standards generator for permeation tubes is described. This system provides reliable temperature control during periods of intermittent power and is ideal for field measurements. A eutectic alloy with a high heat of fusion is used as a phase change material. This thermal source allows the system to maintain a constant permeation tube temperature of 46.6 ° C for over 5 h in the absence of external power. This permeation system is currently being used in an aircraft chemical ionization mass spectrometer to provide HNO 3 calibration. © 2003 American Institute of Physics.