GB405937A - Improvements in and relating to apparatus for detecting the presence of mercury vapour - Google Patents

Improvements in and relating to apparatus for detecting the presence of mercury vapour

Info

Publication number
GB405937A
GB405937A GB31857/33A GB3185733A GB405937A GB 405937 A GB405937 A GB 405937A GB 31857/33 A GB31857/33 A GB 31857/33A GB 3185733 A GB3185733 A GB 3185733A GB 405937 A GB405937 A GB 405937A
Authority
GB
United Kingdom
Prior art keywords
mercury vapour
radiation
detecting
diaphragm
indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB31857/33A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB405937A publication Critical patent/GB405937A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/3103—Atomic absorption analysis

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A device for detecting mercury vapour comprises a source of monochromatic radiation 9 situated between two similar absorption chambers 7, 10, one of which is traversed by the gas to be tested the other being provided with a diaphragm 11 for calibration purposes. Two photo electric cells 26, 27 exposed to the radiation traversing the absorption chambers are connected in a balanced circuit to which is connected a two-stage thermionic amplifier 29 actuating an indicator 30. The amount of mercury vapour present in the chamber 7 may be indicated by calibration of the indicator 30 and/or of the diaphragm 11. The photoelectric cells preferably have sodium cathodes. The source of radiation 9 comprises a cylindrical <PICT:0405937/III/1> resonance lamp 20 containing mercury vapour which is excited by a mercury vapour lamp 14 of circular form surrounding the chamber 20.
GB31857/33A 1932-11-16 1933-11-15 Improvements in and relating to apparatus for detecting the presence of mercury vapour Expired GB405937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US405937XA 1932-11-16 1932-11-16

Publications (1)

Publication Number Publication Date
GB405937A true GB405937A (en) 1934-02-15

Family

ID=21911830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31857/33A Expired GB405937A (en) 1932-11-16 1933-11-15 Improvements in and relating to apparatus for detecting the presence of mercury vapour

Country Status (1)

Country Link
GB (1) GB405937A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513283A (en) * 1946-09-28 1950-07-04 C O Two Fire Equipment Co Photoelectric convection smoke detector
DE1074879B (en) * 1960-02-04 Badische Anilin &. Soda Fabrik Aktiengesellschaft Ludwigshafen/Rhem Process for determining the chlorine content of air or other gases
US3173016A (en) * 1962-03-05 1965-03-09 Cordero Mining Company Method and apparatus for measurement of mercury vapor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074879B (en) * 1960-02-04 Badische Anilin &. Soda Fabrik Aktiengesellschaft Ludwigshafen/Rhem Process for determining the chlorine content of air or other gases
US2513283A (en) * 1946-09-28 1950-07-04 C O Two Fire Equipment Co Photoelectric convection smoke detector
US3173016A (en) * 1962-03-05 1965-03-09 Cordero Mining Company Method and apparatus for measurement of mercury vapor

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