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Title: 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:
 [1];  [1]
  1. Deep River, CA
Issue Date:
OSTI Identifier:
862879
Patent Number(s):
4033699
Assignee:
Atomic Energy of Canada Limited (Ottawa, CA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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 = {1977},
month = {1}
}

Patent:

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