JPS53122469A - Gas detector - Google Patents

Gas detector

Info

Publication number
JPS53122469A
JPS53122469A JP3718977A JP3718977A JPS53122469A JP S53122469 A JPS53122469 A JP S53122469A JP 3718977 A JP3718977 A JP 3718977A JP 3718977 A JP3718977 A JP 3718977A JP S53122469 A JPS53122469 A JP S53122469A
Authority
JP
Japan
Prior art keywords
gas detector
alarm
light
respective outputs
receiving
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
Application number
JP3718977A
Other languages
Japanese (ja)
Inventor
Tsunehiko Araki
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP3718977A priority Critical patent/JPS53122469A/en
Publication of JPS53122469A publication Critical patent/JPS53122469A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

Abstract

PURPOSE:To prevent false alarm by receiving the light which is the parallel rays to a receiving chamber having passed through an interference filter and the light which is not, in respective photoelectric elements and connecting the respective outputs to a main alarm and an auxiliary alarm which respond to the respective outputs.
JP3718977A 1977-03-31 1977-03-31 Gas detector Pending JPS53122469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3718977A JPS53122469A (en) 1977-03-31 1977-03-31 Gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3718977A JPS53122469A (en) 1977-03-31 1977-03-31 Gas detector

Publications (1)

Publication Number Publication Date
JPS53122469A true JPS53122469A (en) 1978-10-25

Family

ID=12490626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3718977A Pending JPS53122469A (en) 1977-03-31 1977-03-31 Gas detector

Country Status (1)

Country Link
JP (1) JPS53122469A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6434553U (en) * 1987-08-25 1989-03-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6434553U (en) * 1987-08-25 1989-03-02
JPH0533952Y2 (en) * 1987-08-25 1993-08-27

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