Gas analyzer apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 6, 1990
Grant Date -
N/A
app pub date -
Jan 30, 1989
filing date -
Jan 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cold-cathode gas discharge device is coupled between a gas sample inlet and a high vacuum and includes spaced-apart electrodes which, when coupled across a high voltage DC power supply, causes a glow-discharge to be set up within the device with the intensity of the emitted light being proportional to the percentage of a given gas contained within a gas mixture introduced through the sampling inlet. In accordance with the present invention, the glow-discharge device contains a tubular pathway which is bent at a point intermediate the spaced electrodes so that they are not co-linear along the tubular path. A photodetector is sighted coaxially with the downstream leg of the bent pathway and, as such, senses the light emitted in a longitudinal direction rather than in a transverse direction. As such, errors due to fogging of the pathway over time by electrode material or the like and movement of the cathode dark-spaced and Faraday dark-space within the tube do not alter the measurable radiation.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully