JPS5476198A - Gas detector - Google Patents
Gas detectorInfo
- Publication number
- JPS5476198A JPS5476198A JP14346177A JP14346177A JPS5476198A JP S5476198 A JPS5476198 A JP S5476198A JP 14346177 A JP14346177 A JP 14346177A JP 14346177 A JP14346177 A JP 14346177A JP S5476198 A JPS5476198 A JP S5476198A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- signal
- electrode
- converted
- ultraviolet ray
- 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
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
PURPOSE: To improve the S/N ratio of a signal output circuit by containing a photoelectric face 1, detection resistance and buffer amplifier within the same casing in an ultraviolet ray ionization type SF6 gas detector.
CONSTITUTION: When the photo electrons emitted from a photoelectric face 1 by ultraviolet ray radiation deposite on O2, SF6 gas in a casing 4, these are ionized. Negative ions 6 move toward an acceleration electrode 2 to which a voltage is applied from an acceleration power source 5 between shield electrode 3, while being accelerated with said electrode 2. Hence, the minute signal generated by the movement of the ions 6, i.e., displacement current, is flowed in a detection resistance 7 and is thereby converted to a voltage signal. This voltage signal is inputted to a buffer amplifier 8 and is thereby amplified. Although the input impedance of the amplifier 8 is high, it is converted to a low impedance by the amplifier 8 and the signal having been reduced of the effect of the distribution capacity of lead-out wires is sent out to an amplifier 10 which has output terminal 11 and is provided on the outside.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14346177A JPS5476198A (en) | 1977-11-29 | 1977-11-29 | Gas detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14346177A JPS5476198A (en) | 1977-11-29 | 1977-11-29 | Gas detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476198A true JPS5476198A (en) | 1979-06-18 |
Family
ID=15339234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14346177A Pending JPS5476198A (en) | 1977-11-29 | 1977-11-29 | Gas detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476198A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090008571A1 (en) * | 2006-03-17 | 2009-01-08 | Shigeki Matsuura | Ionizing Device |
JP2009098084A (en) * | 2007-10-19 | 2009-05-07 | Fujitsu Ltd | Atmosphere analyzer and atmosphere analyzing method |
US8044343B2 (en) | 2006-03-17 | 2011-10-25 | Rigaku Corporation | Gas analyzer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3211996A (en) * | 1960-12-05 | 1965-10-12 | Westinghouse Electric Corp | Apparatus for detecting electronegative gases in a mixture of gases |
JPS5032639A (en) * | 1973-07-31 | 1975-03-29 |
-
1977
- 1977-11-29 JP JP14346177A patent/JPS5476198A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3211996A (en) * | 1960-12-05 | 1965-10-12 | Westinghouse Electric Corp | Apparatus for detecting electronegative gases in a mixture of gases |
JPS5032639A (en) * | 1973-07-31 | 1975-03-29 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090008571A1 (en) * | 2006-03-17 | 2009-01-08 | Shigeki Matsuura | Ionizing Device |
US8044343B2 (en) | 2006-03-17 | 2011-10-25 | Rigaku Corporation | Gas analyzer |
US8592779B2 (en) * | 2006-03-17 | 2013-11-26 | Hamamatsu Photonics K.K. | Ionizing device |
JP2009098084A (en) * | 2007-10-19 | 2009-05-07 | Fujitsu Ltd | Atmosphere analyzer and atmosphere analyzing method |
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