Personal gas monitor

Details Personal gas monitor Personal gas monitor

1980-12-05

1982-09-21

Swisher, S. Clement

Measuring and testing

Gas analysis

Gas chromatography

7386321, 422 88, G01N 122, G01N 704

Patent

active

043500374

ABSTRACT:
A column of particulate adsorbent is located within a longitudinally extending stainless steel tube. The pollutant gas to be monitored reaches the adsorbent by molecular diffusion after passing through a diffusion gauze at the diffusion end of the tube, a stagnant diffusion zone and a partition gauze forming one longitudinal boundary of the column. In one embodiment the diffusion gauze is removably mounted in a diffusion cap that may be slid over the tube; in another, the diffusion gauze and the partition gauze are mounted in a unit which in manufacture is fitted and permanently fixed within the tube. The invention establishes that the repeatability problem in molecular diffusion personal monitors lies in the hitherto unsuspected criticality of the stagnant diffusion zone parameters and provides a general solution enabling a good compromise between repeatability and sensitivity without the need for unduly close manufacturing tolerances.

REFERENCES:
patent: 3950980 (1976-04-01), Braun et al.
patent: 3985017 (1976-10-01), Goldsmith
patent: 4040805 (1977-08-01), Nelms et al.
patent: 4158958 (1979-06-01), Braun
patent: 4235097 (1980-11-01), Kring
patent: 4267023 (1981-05-01), Frant

Affiliated with

Also associated with

Rating

Personal gas monitor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Personal gas monitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Personal gas monitor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2070983