EP0126036B1 - Appareil détecteur de gaz inflammable à intervention prédéterminée - Google Patents

Appareil détecteur de gaz inflammable à intervention prédéterminée Download PDF

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Publication number
EP0126036B1
EP0126036B1 EP84830113A EP84830113A EP0126036B1 EP 0126036 B1 EP0126036 B1 EP 0126036B1 EP 84830113 A EP84830113 A EP 84830113A EP 84830113 A EP84830113 A EP 84830113A EP 0126036 B1 EP0126036 B1 EP 0126036B1
Authority
EP
European Patent Office
Prior art keywords
gas
resistance
cathode
detector
diode
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
EP84830113A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0126036A1 (fr
Inventor
Roberto Ferraro
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.)
CONTROFUGAS Srl
Original Assignee
CONTROFUGAS Srl
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 CONTROFUGAS Srl filed Critical CONTROFUGAS Srl
Priority to AT84830113T priority Critical patent/ATE29183T1/de
Publication of EP0126036A1 publication Critical patent/EP0126036A1/fr
Application granted granted Critical
Publication of EP0126036B1 publication Critical patent/EP0126036B1/fr
Expired legal-status Critical Current

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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

Definitions

  • a flammable gas detector device comprises a detector element in the form of a narrow spiral made of a thin wire of platinum alloy, inserted in a resistance bridge circuit by which the variation in resistance of the detector as a function of the density of the gas which surrounds it determines, in the bridge circuit, an imbalance which makes it possible to obtain a control signal from a device d alarm and / or intervention.
  • the detector element used has a sensitivity varying according to variations in the operating electric voltage: the value of this voltage being related to the type of gas with which the detector is present. More precisely, it appeared that the supply voltage of maximum sensitivity, and therefore optimal response, of said detector is 2 V DC for methane gas at a concentration of 2% and 1.6 V DC for propane gas. butane at a concentration of 0.8% and that the variation of the voltage measured at the ends of the detector thus supplied is 0.2 V while passing, in the vicinity of the detector, from the condition of absence of gas to that of presence of gas according to the aforementioned percentage.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP84830113A 1983-05-17 1984-04-12 Appareil détecteur de gaz inflammable à intervention prédéterminée Expired EP0126036B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84830113T ATE29183T1 (de) 1983-05-17 1984-04-12 Detektorgeraet fuer brennbares gas mit vorherbestimmtem eingreifer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT943383 1983-05-17
IT09433/83A IT1198606B (it) 1983-05-17 1983-05-17 Apparecchio rivelatore di gas infiammabile ad intervento precondizionato

Publications (2)

Publication Number Publication Date
EP0126036A1 EP0126036A1 (fr) 1984-11-21
EP0126036B1 true EP0126036B1 (fr) 1987-08-26

Family

ID=11130072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830113A Expired EP0126036B1 (fr) 1983-05-17 1984-04-12 Appareil détecteur de gaz inflammable à intervention prédéterminée

Country Status (5)

Country Link
US (1) US4652831A (it)
EP (1) EP0126036B1 (it)
AT (1) ATE29183T1 (it)
DE (1) DE3465645D1 (it)
IT (1) IT1198606B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218347A (en) * 1991-11-12 1993-06-08 Lindale Industries, Inc. Apparatus for detecting hazardous gases
US5918260A (en) * 1997-06-11 1999-06-29 Cts Corporation Gas sensor with multi-level sensitivity circuitry
WO2021043039A1 (zh) * 2019-09-04 2021-03-11 上海乐研电气有限公司 一种气体密度继电器的改造方法、一种具有在线自校验功能的气体密度继电器及其校验方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065497A1 (fr) * 1981-05-05 1982-11-24 Franco Maria Conte' Appareil détecteur de gaz inflammable

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239828A (en) * 1962-07-27 1966-03-08 Erdco Eng Corp Combustible gas detector
US3399398A (en) * 1965-07-27 1968-08-27 Mine Safety Appliances Co Combustible gas monitoring system
US3577167A (en) * 1968-02-29 1971-05-04 Rca Corp Integrated circuit biasing arrangements
CH579309A5 (it) * 1973-11-09 1976-08-31 Nohmi Bosai Kogyo Co Ltd
DE2714040C3 (de) * 1977-03-30 1979-10-04 Auergesellschaft Gmbh, 1000 Berlin Gasmeßgerät
US4384934A (en) * 1978-05-31 1983-05-24 The Flinders University Of South Australia Means for determining the partial pressure of oxygen in an atmosphere
US4352087A (en) * 1981-04-22 1982-09-28 Marie C. Kercheval Fume detector and alarm system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065497A1 (fr) * 1981-05-05 1982-11-24 Franco Maria Conte' Appareil détecteur de gaz inflammable

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELEKTOR, vol. 8, no. 9, septembre 1982, Canterbury, Kent (GB); "24 hour protection against gas leaks", pages 916-919. *
THE RADIO AND ELECTRONIC ENGINEER, vol. 44, no. 2, février 1974, Londres (GB); J. WATSON et al.: "Applications of the Taguchi gas sensor to alarms for inflammable gases", pages 85-91. *

Also Published As

Publication number Publication date
US4652831A (en) 1987-03-24
IT8309433A0 (it) 1983-05-17
ATE29183T1 (de) 1987-09-15
EP0126036A1 (fr) 1984-11-21
DE3465645D1 (en) 1987-10-01
IT1198606B (it) 1988-12-21

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