Vapor concentration monitor
Abstract
An apparatus for monitoring the concentration of a vapor, such as heavy water, having at least one narrow bandwidth in its absorption spectrum, in a sample gas such as air. The air is drawn into a chamber in which the vapor content is measured by means of its radiation absorption spectrum. High sensitivity is obtained by modulating the wavelength at a relatively high frequency without changing its optical path, while high stability against zero drift is obtained by the low frequency interchange of the sample gas to be monitored and of a reference sample. The variable HDO background due to natural humidity is automatically corrected.
- Inventors:
-
- Deep River, CA
- Issue Date:
- OSTI Identifier:
- 862879
- Patent Number(s):
- 4033699
- Assignee:
- Atomic Energy of Canada Limited (Ottawa, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- vapor; concentration; monitor; apparatus; monitoring; heavy; water; narrow; bandwidth; absorption; spectrum; sample; gas; air; drawn; chamber; content; measured; means; radiation; sensitivity; obtained; modulating; wavelength; relatively; frequency; changing; optical; path; stability; zero; drift; interchange; monitored; reference; variable; hdo; background; due; natural; humidity; automatically; corrected; radiation absorption; narrow bandwidth; heavy water; optical path; sample gas; narrow band; absorption spectrum; reference sample; vapor concentration; concentration monitor; vapor content; /356/250/376/976/
Citation Formats
Bayly, John G, and Booth, Ronald J. Vapor concentration monitor. United States: N. p., 1977.
Web.
Bayly, John G, & Booth, Ronald J. Vapor concentration monitor. United States.
Bayly, John G, and Booth, Ronald J. Sat .
"Vapor concentration monitor". United States. https://www.osti.gov/servlets/purl/862879.
@article{osti_862879,
title = {Vapor concentration monitor},
author = {Bayly, John G and Booth, Ronald J},
abstractNote = {An apparatus for monitoring the concentration of a vapor, such as heavy water, having at least one narrow bandwidth in its absorption spectrum, in a sample gas such as air. The air is drawn into a chamber in which the vapor content is measured by means of its radiation absorption spectrum. High sensitivity is obtained by modulating the wavelength at a relatively high frequency without changing its optical path, while high stability against zero drift is obtained by the low frequency interchange of the sample gas to be monitored and of a reference sample. The variable HDO background due to natural humidity is automatically corrected.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1977},
month = {Sat Jan 01 00:00:00 EST 1977}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.