FR2406821A1 - Dosimetre chimique perfectionne - Google Patents

Dosimetre chimique perfectionne

Info

Publication number
FR2406821A1
FR2406821A1 FR7731510A FR7731510A FR2406821A1 FR 2406821 A1 FR2406821 A1 FR 2406821A1 FR 7731510 A FR7731510 A FR 7731510A FR 7731510 A FR7731510 A FR 7731510A FR 2406821 A1 FR2406821 A1 FR 2406821A1
Authority
FR
France
Prior art keywords
dosimeter
integrator
constant flow
variable drive
filter
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.)
Granted
Application number
FR7731510A
Other languages
English (en)
Other versions
FR2406821B1 (fr
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to FR7731510A priority Critical patent/FR2406821A1/fr
Publication of FR2406821A1 publication Critical patent/FR2406821A1/fr
Application granted granted Critical
Publication of FR2406821B1 publication Critical patent/FR2406821B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N2001/222—Other features
    • G01N2001/2223—Other features aerosol sampling devices

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne les dispositifs destinés à contrôler la composition de l'atmosphère dans laquelle séjourne une personne Le dosimètre chimique de l'invention comprend essentiellement un filtre 2 qui retient les substances que l'on désire contrôler, une pompe 3 entraînée par un moteur électrique 9, une restriction 5 sur laquelle est branché un manocontact différentiel 6, un intégrateur 7 et un amplificateur 8. Le moteur 9 est commandé de façon à assurer un débit d'air constant dans le filtre, pour éviter les erreurs résultant d'une obstruction accidentelle de la prise d'air. Application à la surveillance d'ouvriers travaillant dans une atmosphère dangereuse.
FR7731510A 1977-10-19 1977-10-19 Dosimetre chimique perfectionne Granted FR2406821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7731510A FR2406821A1 (fr) 1977-10-19 1977-10-19 Dosimetre chimique perfectionne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731510A FR2406821A1 (fr) 1977-10-19 1977-10-19 Dosimetre chimique perfectionne

Publications (2)

Publication Number Publication Date
FR2406821A1 true FR2406821A1 (fr) 1979-05-18
FR2406821B1 FR2406821B1 (fr) 1984-03-30

Family

ID=9196705

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731510A Granted FR2406821A1 (fr) 1977-10-19 1977-10-19 Dosimetre chimique perfectionne

Country Status (1)

Country Link
FR (1) FR2406821A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965940A (en) * 1974-03-06 1976-06-29 Emil Marty Rigid and flexible mounting for reed-dent in a profiled stave

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965940A (en) * 1974-03-06 1976-06-29 Emil Marty Rigid and flexible mounting for reed-dent in a profiled stave

Also Published As

Publication number Publication date
FR2406821B1 (fr) 1984-03-30

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse