Monitoring gas and vapor concentrations

Details Monitoring gas and vapor concentrations Monitoring gas and vapor concentrations

1982-09-23

1986-01-07

Evans, F. L.

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

356 51, 356320, G01J 142

Patent

active

045635854

ABSTRACT:
In the monitoring of gas or vapor concentrations in a gas sample by comparing the transmission of light through the sample at different wavelengths corresponding to behaviorial maxima and minima of the gas, the different wavelengths are selected by permitting light to fall alternately on different sets of slits in an entrance mask of a spectroscope so that light diffracted by a grating in the spectroscope at the wavelengths represented by the slits in the two sets will fall on an exit slit in an exit mask of the spectroscope and thence pass to a photodetector. This arrangement enables the shift between the different sets of wavelengths to be achieved without introducing mechanical jitter, since the photodetector output may be electronically gated so as to be measured only for predetermined periods when light is passing first through one and then through the other set of slits.

REFERENCES:
patent: 3279308 (1966-10-01), Bartz et al.
patent: 3518002 (1970-06-01), Barringer et al.
patent: 3522739 (1970-08-01), Coor et al.
patent: 3554649 (1971-01-01), Ridgway
patent: 3837744 (1974-09-01), Egan et al.
patent: 4057734 (1977-11-01), Barringer

Affiliated with

Also associated with

Rating

Monitoring gas and vapor concentrations does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-112794