JPS5596442A - Contact-combustion-type carbon monoxide detector - Google Patents
Contact-combustion-type carbon monoxide detectorInfo
- Publication number
- JPS5596442A JPS5596442A JP304079A JP304079A JPS5596442A JP S5596442 A JPS5596442 A JP S5596442A JP 304079 A JP304079 A JP 304079A JP 304079 A JP304079 A JP 304079A JP S5596442 A JPS5596442 A JP S5596442A
- Authority
- JP
- Japan
- Prior art keywords
- carbon monoxide
- detector
- combustion
- contact
- sensitivity
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
PURPOSE: To qualify the sensitivity only to carbon monoxide and to enable the detection of low-concentration carbon monoxide, by adjusting the voltage and setting the temperature of elements of the bridge of a contact-combustion-type gas detector in a prescribed range.
CONSTITUTION: The bridge circuit of a contact-combustion-type gas detector comprises a DC or AC power surce 1, an active resistor 2, a compensation resistor 3, other resistors 4, 5, and a millivolt-meter 6. The voltage of the bridge circuit is adjusted to set the temperature of the detector at 150W230°C. The sensitivity to carbon monoxide gas is low because the molecular combustion heat of the carbon monoxide gas is smaller than that of CH4 or other hydrocarbon. Since carbon monoxide is poisonous, it needs to be detected even if is concentration is low. Therefore, the detector of high bridge voltage is used. Carbon monoxide starts burning at about 150°C lower than hydrocarbon and the sensitivity of the gas detector shows the highest at 170W200°C. The temperature of the resistors 2, 3 are set in the range of 150W230°C, in which other gases do not start buring. As a result, the detector is made sensitive to only carbon monoxide.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP304079A JPS5596442A (en) | 1979-01-17 | 1979-01-17 | Contact-combustion-type carbon monoxide detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP304079A JPS5596442A (en) | 1979-01-17 | 1979-01-17 | Contact-combustion-type carbon monoxide detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5596442A true JPS5596442A (en) | 1980-07-22 |
Family
ID=11546189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP304079A Pending JPS5596442A (en) | 1979-01-17 | 1979-01-17 | Contact-combustion-type carbon monoxide detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5596442A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741758A (en) * | 1980-08-22 | 1982-03-09 | Casio Comput Co Ltd | Periodic totalizing system |
| JPS63271150A (en) * | 1987-04-28 | 1988-11-09 | Osaka Gas Co Ltd | Contact combustion type gaseous carbon monoxide sensor |
| JP2001091487A (en) * | 1999-09-20 | 2001-04-06 | Yazaki Corp | Gas detector |
| WO2005015191A1 (en) * | 2003-08-11 | 2005-02-17 | Hitachi, Ltd. | Gas sensor and gas detecting method |
| JP2009244279A (en) * | 2009-07-27 | 2009-10-22 | Hitachi Ltd | Gas sensor and gas detection method |
-
1979
- 1979-01-17 JP JP304079A patent/JPS5596442A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741758A (en) * | 1980-08-22 | 1982-03-09 | Casio Comput Co Ltd | Periodic totalizing system |
| JPS63271150A (en) * | 1987-04-28 | 1988-11-09 | Osaka Gas Co Ltd | Contact combustion type gaseous carbon monoxide sensor |
| JPH0473744B2 (en) * | 1987-04-28 | 1992-11-24 | ||
| JP2001091487A (en) * | 1999-09-20 | 2001-04-06 | Yazaki Corp | Gas detector |
| WO2005015191A1 (en) * | 2003-08-11 | 2005-02-17 | Hitachi, Ltd. | Gas sensor and gas detecting method |
| JPWO2005015191A1 (en) * | 2003-08-11 | 2006-10-05 | 株式会社日立製作所 | Gas sensor and gas detection method |
| JP2009244279A (en) * | 2009-07-27 | 2009-10-22 | Hitachi Ltd | Gas sensor and gas detection method |
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