Title:
PORTABLE GAS DETECTOR
Document Type and Number:
Japanese Patent JPS61235751
Kind Code:
A
Abstract:
1. Portable gas dosimeter for determining harmful substances in the air, wherein in a transparent housing with inlet opening on one side an indicator strip is visibly arranged and geometrically shaped such that its effective width decreases with the distance from the inlet opening, characterised in that the width b of the indicator strip (3) is determined according to the equation see diagramm : EP0202423,P3,F1 where k denotes a constant expressing the diffusion ratios, c denotes the harmful substance concentration, t denotes the sampling time and l denotes the discolouration length desired for each product of c. t, determined so that it increases linearly with c. t.
Inventors:
PANNWITZ KARL-HEINZ (DE)
Application Number:
JP8029286A
Publication Date:
October 21, 1986
Filing Date:
April 09, 1986
Export Citation:
Assignee:
DRAEGERWERK AG
International Classes:
G01N31/22; (IPC1-7): G01N31/22
Domestic Patent References:
| JPS5786049A | 1982-05-28 | |||
| JP47040556U |
Attorney, Agent or Firm:
Toshio Yano
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