FR2382690A1 - Detecteur de gaz - Google Patents

Detecteur de gaz

Info

Publication number
FR2382690A1
FR2382690A1 FR7705886A FR7705886A FR2382690A1 FR 2382690 A1 FR2382690 A1 FR 2382690A1 FR 7705886 A FR7705886 A FR 7705886A FR 7705886 A FR7705886 A FR 7705886A FR 2382690 A1 FR2382690 A1 FR 2382690A1
Authority
FR
France
Prior art keywords
photodetector
light source
detector system
source monitoring
normally transparent
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
FR7705886A
Other languages
English (en)
Other versions
FR2382690B3 (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.)
BERWINNE ETIENNE DE
Original Assignee
BERWINNE ETIENNE DE
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 BERWINNE ETIENNE DE filed Critical BERWINNE ETIENNE DE
Priority to FR7705886A priority Critical patent/FR2382690A1/fr
Publication of FR2382690A1 publication Critical patent/FR2382690A1/fr
Application granted granted Critical
Publication of FR2382690B3 publication Critical patent/FR2382690B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
    • 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
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

Dispositif mobile de détection de divers gaz nocifs au moyen d'indicateurs chimiques qui, en se colorant sous l'action desdits gaz, réduisent l'éclairement d'une cellule photoélectrique et, corrélativement, l'intensité du courant qu'elle délivre. Au delà d'un certain seuil d'intensite, un relais connecté à la cellule se déclenche et libère un avertisseur d'alerte sonore ou lumineux ou sonore et lumineux à la fois.
FR7705886A 1977-03-01 1977-03-01 Detecteur de gaz Granted FR2382690A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7705886A FR2382690A1 (fr) 1977-03-01 1977-03-01 Detecteur de gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7705886A FR2382690A1 (fr) 1977-03-01 1977-03-01 Detecteur de gaz

Publications (2)

Publication Number Publication Date
FR2382690A1 true FR2382690A1 (fr) 1978-09-29
FR2382690B3 FR2382690B3 (fr) 1980-02-01

Family

ID=9187370

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7705886A Granted FR2382690A1 (fr) 1977-03-01 1977-03-01 Detecteur de gaz

Country Status (1)

Country Link
FR (1) FR2382690A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021190A1 (fr) * 1979-06-16 1981-01-07 Bayer Ag Dispositif pour la surveillance individuelle de l'exposition d'une personne à des gaz toxiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021190A1 (fr) * 1979-06-16 1981-01-07 Bayer Ag Dispositif pour la surveillance individuelle de l'exposition d'une personne à des gaz toxiques

Also Published As

Publication number Publication date
FR2382690B3 (fr) 1980-02-01

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Legal Events

Date Code Title Description
ST Notification of lapse