JPS5616861A - Gas detecting unit - Google Patents
Gas detecting unitInfo
- Publication number
- JPS5616861A JPS5616861A JP9287279A JP9287279A JPS5616861A JP S5616861 A JPS5616861 A JP S5616861A JP 9287279 A JP9287279 A JP 9287279A JP 9287279 A JP9287279 A JP 9287279A JP S5616861 A JPS5616861 A JP S5616861A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- resistance
- gas detecting
- detecting unit
- source voltage
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Emergency Alarm Devices (AREA)
Abstract
PURPOSE: To simplify the structure of a gas detecting unit to make it possible to obtain it at low cost, by providing a gas detecting part consisting of a resistance and a metal oxide semiconductor gas sensor, where the resistance value for gas sensing is dependent upon temperatures, a transformer for supply of heater electric power and so on, and a resistance value control part.
CONSTITUTION: A gas detecting unit is constituted by a gas detecting part provided with metal oxide semiconductor gas sensor 1, where the resistance value for gas sensing is dependent upon temperatures, and resistance 2 and 20 connected in series to gas sensor 1, heater 5 to heat gas sensor 1, transformer 6 for supply of heater electric power and so on, and control part 3 which is so constituted that resistance values of resistances 2 and 20 may be increased or reduced in the same direction as increment or reduction of the power source voltage when the power source voltage is fluctuated. As a result, change of the sensor temperature dependent upon fluctuation of the power source voltage is cancelled, and change of concentration to start the operation of alarm and so on is eliminated, and a structure suitable specially as the gas leakage alarm equipment for city gas is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9287279A JPS5616861A (en) | 1979-07-21 | 1979-07-21 | Gas detecting unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9287279A JPS5616861A (en) | 1979-07-21 | 1979-07-21 | Gas detecting unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5616861A true JPS5616861A (en) | 1981-02-18 |
JPS6133379B2 JPS6133379B2 (en) | 1986-08-01 |
Family
ID=14066518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9287279A Granted JPS5616861A (en) | 1979-07-21 | 1979-07-21 | Gas detecting unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616861A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170809U (en) * | 1983-04-30 | 1984-11-15 | 株式会社島津製作所 | optical connector |
WO2005015190A1 (en) * | 2003-08-06 | 2005-02-17 | Saia-Burgess Murten Ag | Method and arrangement for detecting substances by means of regulation of an electrical resistance of a sensor |
-
1979
- 1979-07-21 JP JP9287279A patent/JPS5616861A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170809U (en) * | 1983-04-30 | 1984-11-15 | 株式会社島津製作所 | optical connector |
WO2005015190A1 (en) * | 2003-08-06 | 2005-02-17 | Saia-Burgess Murten Ag | Method and arrangement for detecting substances by means of regulation of an electrical resistance of a sensor |
CH696777A5 (en) * | 2003-08-06 | 2007-11-30 | Saia Burgess Murten Ag | Arrangement and method for the detection of substances. |
Also Published As
Publication number | Publication date |
---|---|
JPS6133379B2 (en) | 1986-08-01 |
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