GB2345340A - Sample chamber for testing a gas detector - Google Patents

Sample chamber for testing a gas detector Download PDF

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Publication number
GB2345340A
GB2345340A GB9828126A GB9828126A GB2345340A GB 2345340 A GB2345340 A GB 2345340A GB 9828126 A GB9828126 A GB 9828126A GB 9828126 A GB9828126 A GB 9828126A GB 2345340 A GB2345340 A GB 2345340A
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GB
United Kingdom
Prior art keywords
gas
shroud
gas detector
testing
test
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
Application number
GB9828126A
Other versions
GB2345340B (en
GB9828126D0 (en
Inventor
John Michael Stones
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Individual
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Individual
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 Individual filed Critical Individual
Priority to GB9828126A priority Critical patent/GB2345340B/en
Publication of GB9828126D0 publication Critical patent/GB9828126D0/en
Publication of GB2345340A publication Critical patent/GB2345340A/en
Application granted granted Critical
Publication of GB2345340B publication Critical patent/GB2345340B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/007—Arrangements to check the analyser
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0006—Calibrating gas analysers

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

A flexible plastic shroud is used to contain a reference gas sample adjacent to a gas detector. The shroud comprises an elasticated neck for adaptation to detectors of different sizes. A valve may be provided, consisting of two discs, where one disc acts as a reuseable cover that is peeled off to allow the injection of gas e.g. by an aerosol.

Description

GAS DETECTOR TEST SHROUD AND VALVE ASSEMBLY This invention relates to a Test Shroud and valve assembly for testing Gas Detectors.
The sensors used in Gas Detectors have a life limit of typically five years. There is a need to test such devices annually to ensure continual satisfactory operation.
To avoid false alarms detectors are manufactured incorporating a micro processors which cycle test the air over a time predetermined by the manufacturer to enable gas concentrations to be detected once dangerous levels are reached.
Because of this cycle period it is necessary to maintain the presences of test gases around a gas detector over the test period.
Gas Detectors are manufactured with either battery or mains operation which tend to be a permanent fixture.
This low cost device enables gas to be injected into the shroud from an aerosol can containing the test gas (patent application No. 9817255.4-10th August 1998). The gas is sealed into the shroud by way of a re-usable two part assembly which acts as a gas tight valve.

Claims (3)

  1. CLAIMS 1. A flexible plastic shroud with adjustable elasticated neck opening to provide a universal fit for Gas Detectors. To enable Test Gas to be contained around a gas detector.
  2. 2. A self adhesive valve aperture Disc (Fig 2) enabling the injection of test gases into the shroud as claimed in Claim 1.
  3. 3. A re-usable (stick on-peel off) valve cover Fig 3 enabling the gas tight seal of the valve aperture disc as claimed in Claim 2.
GB9828126A 1998-12-22 1998-12-22 Gas detector test shroud and valve assembly Expired - Fee Related GB2345340B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9828126A GB2345340B (en) 1998-12-22 1998-12-22 Gas detector test shroud and valve assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9828126A GB2345340B (en) 1998-12-22 1998-12-22 Gas detector test shroud and valve assembly

Publications (3)

Publication Number Publication Date
GB9828126D0 GB9828126D0 (en) 1999-02-17
GB2345340A true GB2345340A (en) 2000-07-05
GB2345340B GB2345340B (en) 2003-04-09

Family

ID=10844646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9828126A Expired - Fee Related GB2345340B (en) 1998-12-22 1998-12-22 Gas detector test shroud and valve assembly

Country Status (1)

Country Link
GB (1) GB2345340B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371860A (en) * 2001-01-09 2002-08-07 John Michael Stones Testing gas detectors
GB2392727A (en) * 2002-09-03 2004-03-10 Infitron Inc A gas supply adapter for a gas sensor
WO2015043796A1 (en) * 2013-09-24 2015-04-02 Robert Bosch Gmbh Device and method for calibrating a gas sensor
WO2020236480A1 (en) * 2019-05-17 2020-11-26 Carrier Corporation Gas detector test and calibration method and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742708A (en) * 1986-08-13 1988-05-10 Beckman Industrial Corporation Apparatus for electrochemical sensor calibration
WO1990001160A1 (en) * 1988-07-21 1990-02-08 Radiometer A/S Calibration device for use in calibrating a sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742708A (en) * 1986-08-13 1988-05-10 Beckman Industrial Corporation Apparatus for electrochemical sensor calibration
WO1990001160A1 (en) * 1988-07-21 1990-02-08 Radiometer A/S Calibration device for use in calibrating a sensor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371860A (en) * 2001-01-09 2002-08-07 John Michael Stones Testing gas detectors
GB2371860B (en) * 2001-01-09 2004-08-11 John Michael Stones Gas detector testing accessory
GB2392727A (en) * 2002-09-03 2004-03-10 Infitron Inc A gas supply adapter for a gas sensor
WO2004023135A1 (en) 2002-09-03 2004-03-18 Zellweger Analytics Limited Gas supply adapter
US7225661B2 (en) 2002-09-03 2007-06-05 Honeywell Analytics Limited Gas supply adapter
CN100561219C (en) * 2002-09-03 2009-11-18 哈尼威尔分析有限公司 The air feed breakout box
WO2015043796A1 (en) * 2013-09-24 2015-04-02 Robert Bosch Gmbh Device and method for calibrating a gas sensor
WO2020236480A1 (en) * 2019-05-17 2020-11-26 Carrier Corporation Gas detector test and calibration method and apparatus

Also Published As

Publication number Publication date
GB2345340B (en) 2003-04-09
GB9828126D0 (en) 1999-02-17

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20101021 AND 20101027

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20110224 AND 20110302

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20161222