Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1997-11-17
1999-07-13
Westin, Edward P.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250361R, 422 52, G01N 2176
Patent
active
059230371
ABSTRACT:
In a device for determining the ozone concentration by utilizing the surface chemiluminescence effect having a fan (13), a chemiluminescence element (8), a photomultiplier (6), a temperature sensor (16), and control electronics (12), an airflow generated by a fan (13) passes via a suction pipe (7) and an adjoining light trap system (17) through a venturi-shaped channel structure (2) along a metal block (9) in which a temperature sensor (16) is housed. The device is calibrated with respect to the temperature dependence of the reaction of a chemiluminescence disc (8) attached to the bottom of the metal block by determining the output voltage of a photomultiplier (6) in dependence on the temperature at a predetermined ozone concentration in the measured air. Also integrated into the metal block (9) is a light-emitting diode (LED 15) which is switched in a predetermined switching cycle as a reference light intensity and sends a light to the photomultiplier (6) via an opening (3) in the metal block (9), thus periodically overriding the actual ozone measurement process and resulting in a periodic calibration of the temperature dependence of the output voltage of the photomultiplier (6).
REFERENCES:
patent: 4822564 (1989-04-01), Howard
S. Sahand et al., "A batter-powered light-weight ozone analyzer for use in the troposhere and stratosphere", 1987.
U. Schurath et al., "Principle and application of a fast sensor for atmospheric ozone", Fresenius J Anal Chem, vol. 340, pp. 544-547, 1991.
H. Gusten et al., "Ein neuartiger Ozonsensor fur vielfaltige Anwendungen in der Umwelt", PTB-Mitteilungen 103 pp. 324-328, 1993.
Busen Reinhold
Delany Anthony
Gusten Hans
Stager Rainer
Uhlemann Gerd
Deutsche Forschungsanstalt fur Luft-und Raumfahrt e.V.
Hanig Richard
Westin Edward P.
LandOfFree
Device for determining the ozone concentration in air does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for determining the ozone concentration in air, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for determining the ozone concentration in air will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2277758