Colorimetric gas dosimeter

Details Colorimetric gas dosimeter Colorimetric gas dosimeter

1987-02-19

1988-06-07

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Chemically activated type

422 58, 422 86, 436 3, 436902, G01D 2100, G01N 3122

Patent

active

047489308

ABSTRACT:
A device for indicating the presence of a gas includes a closed housing having an interior wall with a color indicator disk on one side wall and an opposite wall having an opening with an inflow pipe for the inflow of the gas to be detected. The interior of the housing forms a flat measuring chamber having the side wall with the detector disk of a size comparable to the length and diameter of the inflow pipe so as to form a diffusion area across which a mass transport of the gas to be detected takes place, that is, largely independent of air currents. The color indicated disk advantageously has a circular periphery and the inflow pipe is of cylindrical section and it is smaller than one-fifth the diameter of the measuring chamber having the disk. Advantageously, the length of the pipe section is less than the thickness of the measuring chamber. The inflow pipe section advantageously includes a portion of its length extending into the interior of the measuring chamber and a filter interlayer is located in the pipe section.

REFERENCES:
patent: 2787782 (1957-04-01), Rosenblum et al.
patent: 3482944 (1969-12-01), Plantz et al.
patent: 4154794 (1979-05-01), Clyne
patent: 4158958 (1979-06-01), Braun
patent: 4258000 (1981-03-01), Obermayer
patent: 4272480 (1981-06-01), Stull et al.
patent: 4436819 (1984-03-01), Manning

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