Apparatus and method for measuring the dew point of gases using spectral recognition of the condensate

A new method and apparatus is described for measurement of the dew point, and thus the vapor pressure of various gases and gas mixtures. In this method an optical element which is exposed to a gas atmosphere is cooled while its temperature is being monitored. At the same time an optical signal is se...

Full description

Saved in:
Bibliographic Details
Main Author Zarrabian, Sohrab
Format Patent
LanguageEnglish
Published 01.09.2009
Online AccessGet full text

Cover

Abstract A new method and apparatus is described for measurement of the dew point, and thus the vapor pressure of various gases and gas mixtures. In this method an optical element which is exposed to a gas atmosphere is cooled while its temperature is being monitored. At the same time an optical signal is sent through the back of the optical element. The optical signal goes through internal reflections. As soon as dew forms on the surface of the element, the optical signal will exhibit selective absorption due to the interaction of the evanescent tail of the optical signal and based on the chemical nature of the condensate. This invention can also be used to characterize condensable content of gas mixtures. The method allows for the spectral characterization and determination of the condensed vapor. It offers several advantages over existing methods.
AbstractList A new method and apparatus is described for measurement of the dew point, and thus the vapor pressure of various gases and gas mixtures. In this method an optical element which is exposed to a gas atmosphere is cooled while its temperature is being monitored. At the same time an optical signal is sent through the back of the optical element. The optical signal goes through internal reflections. As soon as dew forms on the surface of the element, the optical signal will exhibit selective absorption due to the interaction of the evanescent tail of the optical signal and based on the chemical nature of the condensate. This invention can also be used to characterize condensable content of gas mixtures. The method allows for the spectral characterization and determination of the condensed vapor. It offers several advantages over existing methods.
Author Zarrabian, Sohrab
Author_xml – sequence: 1
  givenname: Sohrab
  surname: Zarrabian
  fullname: Zarrabian, Sohrab
BookMark eNqNi00KAjEMRrvQhX93yAUERWRmK6J4APcSpmmnMCalSfH6TsEDuHofvPet3YKFaeXCJWcsaFUB2cObbBQPQco8UWtJHMFGAk8fyJLYQAJEVFKo2qRmGqzgBIUGiZwsCbemnQZhT6xotHXLgJPS7seNg_vteX3sq-ZZs-krFmw4dOf-2Hfd6Y_kC2tMQlg
ContentType Patent
DBID EFH
DatabaseName USPTO Issued Patents
DatabaseTitleList
Database_xml – sequence: 1
  dbid: EFH
  name: USPTO Issued Patents
  url: http://www.uspto.gov/patft/index.html
  sourceTypes: Open Access Repository
DeliveryMethod fulltext_linktorsrc
ExternalDocumentID 07581877
GroupedDBID EFH
ID FETCH-uspatents_grants_075818773
IEDL.DBID EFH
IngestDate Sun Mar 05 22:32:26 EST 2023
IsOpenAccess true
IsPeerReviewed false
IsScholarly false
Language English
LinkModel DirectLink
MergedId FETCHMERGED-uspatents_grants_075818773
OpenAccessLink https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7581877
ParticipantIDs uspatents_grants_07581877
PatentNumber 7581877
PublicationCentury 2000
PublicationDate 20090901
PublicationDateYYYYMMDD 2009-09-01
PublicationDate_xml – month: 09
  year: 2009
  text: 20090901
  day: 01
PublicationDecade 2000
PublicationYear 2009
References Zhou (2007/0246653) 20071000
Zhou et al. (2008/0123712) 20080500
Zlochin (6926439) 20050800
Boyle (2566307) 19510900
Zlochin (2004/0042526) 20040300
Egan et al. (2004/0240515) 20041200
References_xml – year: 20050800
  ident: 6926439
  contributor:
    fullname: Zlochin
– year: 20040300
  ident: 2004/0042526
  contributor:
    fullname: Zlochin
– year: 20041200
  ident: 2004/0240515
  contributor:
    fullname: Egan et al.
– year: 19510900
  ident: 2566307
  contributor:
    fullname: Boyle
– year: 20071000
  ident: 2007/0246653
  contributor:
    fullname: Zhou
– year: 20080500
  ident: 2008/0123712
  contributor:
    fullname: Zhou et al.
Score 2.74021
Snippet A new method and apparatus is described for measurement of the dew point, and thus the vapor pressure of various gases and gas mixtures. In this method an...
SourceID uspatents
SourceType Open Access Repository
Title Apparatus and method for measuring the dew point of gases using spectral recognition of the condensate
URI https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7581877
hasFullText 1
inHoldings 1
isFullTextHit
isPrint
link http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LT8MwDLa2CQk4gQAxXvKBa6BdtjWc0aoKCbQDSLtNTRP3MtqqabW_P6dFFRe4RX3YVpPan9vPDsCjlmGqyC7EkpQWc7JGKKOlMBknI7y-Zmbma4ffP5bJ1_xts9iMIBlqYb75NRIV2-KeWlc1ZUeuZPfeT7zomz_7HoGF7z6wL3ZlataGnhn3hiqKxjBWgad2reLkFI5ZBEO2onG_gkZ8Bkfr7ug5jGxxAcSAz_fZbh1y9o791s3ImJGH_jsdxxBkNIbG7rEqWTGWhDkHGYeenJ5jVxRZpzscSD9l4a_xN3FWyw7Esb5LwHj1-ZqIwahtXnuyyzb4MV5ewYSTfnsNSBRlIelApS9yHhhGccaEWsogpVBRFk1h-qeYm3_O3cJJ_z_Es6TuYNLUrb3nsNroh-6ZHQBBjoaC
link.rule.ids 230,309,786,808,891,64396
linkProvider USPTO
linkToPdf http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LT4QwEJ6sq_Fx0qhxfc7BaxW27FLPugRfGw6a7I0AbbmsQChk_75TMMSL3kiBdlLaft-03wwAtyl3E6HVjM21SJmnlWRCppzJjJwRGl9TObWxw-_LefjpvaxmqxGEQyzMF00jVpEt5q41VVN24kpa3vsPz_rkzzZHYGGzD2yKdZnISOp74r2u8P0t2LYYa8f6IggPYI8qIdJWNOYXbASHsBN1pUcwUsUxaKJ8NtN2a5D8d-x_3ozEGunS7tQRiiDxMZRqg1VJTWOpMSeYMWjl6Tl2YZF1ssZB9lMW9hn7Evm1tIQYau8EMFh8PIZsMCrOayt3iZ0f8_kpjMntV2eAWvuZq1NHJA_ccyTxOCndlHMn0a7QmT-ByZ_VnP9z7wZ2o6cgfntevl7Afn84YiVTlzBu6lZdEcY26XXXfd_-1ol-
openUrl ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.title=Apparatus+and+method+for+measuring+the+dew+point+of+gases+using+spectral+recognition+of+the+condensate&rft.inventor=Zarrabian%2C+Sohrab&rft.number=7581877&rft.date=2009-09-01&rft.externalDBID=n%2Fa&rft.externalDocID=07581877