GB1201503A - Method and apparatus for detecting the presence of dangerous concentrations of combustible gases and vapors in the air - Google Patents

Method and apparatus for detecting the presence of dangerous concentrations of combustible gases and vapors in the air

Info

Publication number
GB1201503A
GB1201503A GB5039267A GB5039267A GB1201503A GB 1201503 A GB1201503 A GB 1201503A GB 5039267 A GB5039267 A GB 5039267A GB 5039267 A GB5039267 A GB 5039267A GB 1201503 A GB1201503 A GB 1201503A
Authority
GB
United Kingdom
Prior art keywords
air
detecting
combustible gases
gas
oxidation
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
Application number
GB5039267A
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.)
GAS DETECTOR SpA
Original Assignee
GAS DETECTOR SpA
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 GAS DETECTOR SpA filed Critical GAS DETECTOR SpA
Publication of GB1201503A publication Critical patent/GB1201503A/en
Expired 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/716—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited by measuring the radiation emitted by a test object treated by combustion gases for investigating the composition of gas mixtures

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,201,503. Detecting combustable gases. GAS DETECTOR S.p.A. Nov.6, 1967 [Nov.5, 1966], No.50392/67. Heading G1A. In a method of detecting combustible gases or vapours in the ambient air, the air is passed over an oxidation catalyst and radiation emitted during oxidation of said combustible gases or vapours is detected and measured. As shown a blower P blows air through a glass tube 1 contained within an aluminium housing 2 having cooling fins 3. A metal filament 8 heated by a current from a battery B and coated with the catalyst which may be a transition metal such as platinum, palladium, nickel or cobalt or an alloy of these and may contain an accelerator such as thorium, is located within the tube. The oxidation produces visible light at the red end of the spectrum and its intensity is indicative of the concentration of the combustible gas or vapour. This light is however converted into infrared radiation as it passes through the air towards the detectors. Two photo-sensitive silicon cells 7 and 107 are used and the outputs are combined in a differential amplifier A.D. The output, indicative of the difference in the amounts of gas or vapour oxidized adjacent the two photo-cells is fed to a recording, measuring or indicating device M and to a relay R which responds at a given level to sound a bell 10.
GB5039267A 1966-11-05 1967-11-06 Method and apparatus for detecting the presence of dangerous concentrations of combustible gases and vapors in the air Expired GB1201503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT780411 1966-11-05

Publications (1)

Publication Number Publication Date
GB1201503A true GB1201503A (en) 1970-08-05

Family

ID=11125371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5039267A Expired GB1201503A (en) 1966-11-05 1967-11-06 Method and apparatus for detecting the presence of dangerous concentrations of combustible gases and vapors in the air

Country Status (1)

Country Link
GB (1) GB1201503A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198845A (en) * 1986-07-17 1988-06-22 Atomic Energy Authority Uk Sensing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198845A (en) * 1986-07-17 1988-06-22 Atomic Energy Authority Uk Sensing

Similar Documents

Publication Publication Date Title
US3792272A (en) Breath test device for organic components, including alcohol
Kaskan Hydroxyl concentrations in rich hydrogen-air flames held on porous burners
US3647387A (en) Detection device
GB1298978A (en) Improvements in or relating to the measurement of gaseous mixtures
Mansfield et al. High Sensitivity Determination of Zinc, Cadmium, Mercury, Thallium, Gallium, and Indium by Atomic Fluorescence Flame Spectrometry.
US3692415A (en) Photometric analyzer employing fiber optic light transmitting means
GB1500740A (en) Gas measuring apparatus
JPH04507161A (en) simple fire detector
GB1468698A (en) Fluorescent gas analyzer
US3692485A (en) Nitric oxide detection
PORTSCHT Studies on characteristic fluctuations of the flame radiation emitted by fires
GB1201503A (en) Method and apparatus for detecting the presence of dangerous concentrations of combustible gases and vapors in the air
JPS61118647A (en) Gas detector for semiconductor
US3553461A (en) Method and apparatus for detecting the presence of dangerous concentrations of combustible gases or vapors in the air
US3094392A (en) Gas detection
US3200254A (en) Photosensitive detector for airborne particles
CA1188128A (en) Carbon monoxide detector
US4081247A (en) Method and apparatus for the chemiluminescent detection of HCl
US3920993A (en) Piggyback optical bench
US4605535A (en) Apparatus for measuring particle size
US2885555A (en) Combustibles detector
Gutsche et al. Device for trace analysis for fluorine in reaction tubes by atomic-absorption spectroscopy
US4486535A (en) Method and apparatus for measuring particle size
FR2338380A1 (en) Screening hot gas emission from IR detection - by enveloping cold gas flow with lowest absorption in same atmospheric window
US3043668A (en) Method of measuring the proportion of combustible matter in gas streams

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees