Open-electrode ultraviolet source lamp radiates sufficient energy at 1800 angstroms and 1470 angstroms for use in a double-beam, duel-wavelength oxygen sensor. The lamp is filled with xenon at a pressure of 100 mm of Hg

Brisco, F. J.

Moorhead, J. E.

Paige, W. S.

English

NASA Technical Reports Server

October 1967	 Brief 67-10387 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Lamp Enables Measurement of Oxygen Concentration 
in Presence of Water Vapor 
The problem: 
To design an ultraviolet source lamp that will radiate 
sufficient energy at 1800 angstroms and 1470 ang-
stroms for use in a double-beam, dual-wavelength 
oxygen sensor. This instrument determines the oxygen 
concentration in a gas mixture by measuring the 
absorption of ultraviolet radiation through the gas 
sampling cell at the two different wavelengths in order 
to eliminate the effects of ultraviolet absorption by 
water vapor. The source lamp was required to have 
the characteristics of small size, low input power, low-
temperature operation, inherent ruggedness, and long 
life. 
The solution: 
An open-electrode lamp filled with xenon at a pres-
sure of 100 mm of Hg. At this pressure, the lamp gives 
optimum output at 1800 angstroms and a sharp peak
at 1470 angstroms. This sharp peak is useful in align-
ing the slits of the optical system. 
Note: 
Inquiries concerning this development may be di-
rected to:
Technology Utilization Officer 
Manned Spacecraft Center 
Houston, Texas 77058 
Reference: B67-10387 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to NASA, Code 
GP, Washington, D.C. 20546. 
Source: F. J. Brisco, J. E. Moorhead,
and W. S. Paige
of the Perkin-Elmer Corporation
under contract to
Manned Spacecraft Center 
(MSC-10043) 
Category 01 
_.
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
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Lamp enables measurement of oxygen concentration in presence of water vapor

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