Standard, commercially available closed circuit television system detects hydrogen fires in test facilities. It sees in the infrared and displays on a standard cathode ray monitor screen

Proffitt, Robert T.

English

NASA Technical Reports Server

August 1966
	 Brief 66-10363 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U. S. space 
program and to encourage their commercial application. Copies are available to the public from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Infrared Television Used to Detect Hydrogen Fires 
.
The problem: 
Modern test facilities have occasion to use large 
quantities of hydrogen gas from time to time. Be-
cause hydrogen is highly flammable and because 
hydrogen—air and hydrogen—oxygen flames are rela-
tively imperceptible to the human eye, a device or 
system is needed that will make both the fire and 
its point of origin clearly visible to the naked eye. 
The solution: 
A closed circuit television that sees in the infrared 
and displays on , a standard cathode ray monitor 
screen. 
How it's done: 
A standard, commercially available closed circuit 
television system is used to detect the hydrogen fires. 
The television camera vidicon tube is replaced by one 
with spectral response out to the near infrared area to 
approximately a 2.1 micron wavelength. Infrared 
bandpass filters are placed in front of the camera
lens. These filters provide good contrast between 
and definition of hydrogen fires and thebackground 
and lighting conditions normally found in test areas. 
Note: 
Inquiries concerning this invention may be di-
rected to:
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B66-10363 
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: Robert T. Proffitt

of North American Aviation, Inc.

under contract to

Marshall Space Flight Center

(M-FS-654) 
Category 01 
This document was prepared under the sponsorship of the National
	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States
	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States
	 will be free from privately owned rights.
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Infrared Television Used to Detect Hydrogen Fires

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