GB1075054A – Colorimetric gas dosimeter
– Google Patents
GB1075054A – Colorimetric gas dosimeter
– Google Patents
Colorimetric gas dosimeter
Info
Publication number
GB1075054A
GB1075054A
GB3571364A
GB3571364A
GB1075054A
GB 1075054 A
GB1075054 A
GB 1075054A
GB 3571364 A
GB3571364 A
GB 3571364A
GB 3571364 A
GB3571364 A
GB 3571364A
GB 1075054 A
GB1075054 A
GB 1075054A
Authority
GB
United Kingdom
Prior art keywords
plug
indicator
tube
bed
gas
Prior art date
1964-09-01
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
GB3571364A
Inventor
Paul Willis Mcconnaughey
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.)
MSA Safety Inc
Original Assignee
MSA Safety Inc
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.)
1964-09-25
Filing date
1964-09-01
Publication date
1967-07-12
1964-09-01
Application filed by MSA Safety Inc
filed
Critical
MSA Safety Inc
1967-07-12
Publication of GB1075054A
publication
Critical
patent/GB1075054A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
G—PHYSICS
G01—MEASURING; TESTING
G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
Abstract
1,075,054. Gas analysis. MINE SAFETY APPLIANCES CO. Sept.1, 1964, No.35713/64. Heading G1B. A gas dosimeter comprises a sealed transparent tube 2 having a frangible end 5, and a bed of colorimetric indicator reactive with a gas to be detected to give a colour change within the tube and spaced from the end 5 by a plug 10 of porous material. The purpose of the plug 10 is to prevent extraneous air currents from reaching the surface 12 of the indicator bed. Gaseous diffusion into the bed causes a colour change in the indicator the length of the colour change zone being dependent on the concentration of the gas to be detected. In draught-free conditions the plug 10 may be replaced by length of narrowbore tube, but a small plug will also be required to keep the indicator bed in place. The indicator may be activated alumina impregnated with silver cyanide for H 2 S, a granular solid carrying the reaction product of tetramethyldiaminodiphenylmethane and an oxidizing agent for SO 2 , silica gel carrying a benzidine derivative for NO 2 Cl 2 or Br 2 , or activated alumina with thymol blue for CO 2 , and the plug 10 may be a wad of fibre or cloth such as glass wool or cloth or organdy or of sintered glass. A removable cap or stopper may be provided in place of the frangible end 5, and the tube 2 may be marked with a suitable scale or the tube may be mounted on a card incorporating a scale.
GB3571364A
1964-09-25
1964-09-01
Colorimetric gas dosimeter
Expired
GB1075054A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DEM0062560
1964-09-25
Publications (1)
Publication Number
Publication Date
GB1075054A
true
GB1075054A
(en)
1967-07-12
Family
ID=7310489
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3571364A
Expired
GB1075054A
(en)
1964-09-25
1964-09-01
Colorimetric gas dosimeter
Country Status (2)
Country
Link
DE
(1)
DE1498909B2
(en)
GB
(1)
GB1075054A
(en)
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE3137756A1
(en)
*
1980-09-25
1982-07-01
Mine Safety Appliances Co., 15235 Pittsburgh, Pa.
COLORIMETRIC GAS DOSAGE METER
US4528160A
(en)
*
1983-06-14
1985-07-09
Dragerwerk Aktiengesellschaft
Gas dosimeter construction
US4680165A
(en)
*
1982-03-19
1987-07-14
Vo Dinh Tuan
Dosimeter for monitoring vapors and aerosols of organic compounds
US4790857A
(en)
*
1986-11-20
1988-12-13
Miksch Robert R
Gaseous contaminant dosimeter with diffusive material for regulating mass uptake
US4946649A
(en)
*
1985-01-31
1990-08-07
Dragerwerk Aktiengesellschaft
Colorimetric gas diffusion testing tube
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS5883262A
(en)
*
1981-11-13
1983-05-19
Midori Anzen Kk
Harmful gas integrated concentration checker
DE3534934A1
(en)
*
1985-10-01
1987-04-02
Draegerwerk Ag
COLORIMETRIC GAS DOSAGE METER
DE3709296C1
(en)
*
1987-03-20
1988-09-22
Draegerwerk Ag
Colorimetric gas measuring device
WO2008006152A1
(en)
*
2006-07-11
2008-01-17
Paul Nigel Brockwell
Indicator system for determining analyte concentration
1964
1964-09-01
GB
GB3571364A
patent/GB1075054A/en
not_active
Expired
1964-09-25
DE
DE19641498909
patent/DE1498909B2/en
active
Pending
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE3137756A1
(en)
*
1980-09-25
1982-07-01
Mine Safety Appliances Co., 15235 Pittsburgh, Pa.
COLORIMETRIC GAS DOSAGE METER
US4680165A
(en)
*
1982-03-19
1987-07-14
Vo Dinh Tuan
Dosimeter for monitoring vapors and aerosols of organic compounds
US4528160A
(en)
*
1983-06-14
1985-07-09
Dragerwerk Aktiengesellschaft
Gas dosimeter construction
US4946649A
(en)
*
1985-01-31
1990-08-07
Dragerwerk Aktiengesellschaft
Colorimetric gas diffusion testing tube
US4790857A
(en)
*
1986-11-20
1988-12-13
Miksch Robert R
Gaseous contaminant dosimeter with diffusive material for regulating mass uptake
Also Published As
Publication number
Publication date
DE1498909A1
(en)
1969-04-17
DE1498909B2
(en)
1970-03-26
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