EP0126036B1 - Appareil détecteur de gaz inflammable à intervention prédéterminée - Google Patents
Appareil détecteur de gaz inflammable à intervention prédéterminée Download PDFInfo
- 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
Links
Images
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)
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)
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)
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)
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 |
-
1983
- 1983-05-17 IT IT09433/83A patent/IT1198606B/it active
-
1984
- 1984-04-12 EP EP84830113A patent/EP0126036B1/fr not_active Expired
- 1984-04-12 AT AT84830113T patent/ATE29183T1/de not_active IP Right Cessation
- 1984-04-12 DE DE8484830113T patent/DE3465645D1/de not_active Expired
- 1984-05-14 US US06/609,975 patent/US4652831A/en not_active Expired - Fee Related
Patent Citations (1)
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)
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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