UV transmittance measuring device

Details UV transmittance measuring device UV transmittance measuring device

2006-06-20

2008-12-09

Porta, David P. (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

Reexamination Certificate

active

07462835

ABSTRACT:
A device to measure the amount of ultraviolet (UV) light transmitted through a water sample, relative to the amount of UV light transmitted through a sample of known UV transmittance, known as UV percent transmittance (UVT). A single UV sensor is used to measure the amount of UV light transmitted through the blank sample and through the water sample under test. In order to maintain accuracy, compensation must be made for fluctuations or drift in the UV lamp output which is common in UV lamps and due primarily to changes in temperature and imperfections in the lamp. The UV sensor measures the amount of light being emitted by the lamp at the times before and/or after the UV sensor measures the amount of UV light transmitted through the blank and water samples. A microprocessor computes the UVT while using the detector readings to compensate the calculated UVT for any drift and fluctuations in the UV lamp output.

REFERENCES:
patent: 3553454 (1971-01-01), Olson et al.
patent: 3579105 (1971-05-01), Scott
patent: 3591801 (1971-07-01), Watson
patent: 4011451 (1977-03-01), Nelson
patent: 4021670 (1977-05-01), Noakes
patent: 4029958 (1977-06-01), Wright
patent: 4276475 (1981-06-01), Nelson
patent: 4290695 (1981-09-01), Schmitt
patent: 4577106 (1986-03-01), Fukasawa et al.
patent: 4775794 (1988-10-01), Behmann
patent: 4832491 (1989-05-01), Sharpe et al.
patent: 5021196 (1991-06-01), Crano et al.
patent: 5712703 (1998-01-01), Ando et al.
patent: 6365906 (2002-04-01), Spangenberg et al.
patent: 6831740 (2004-12-01), Herzinger et al.
patent: 2002/0066874 (2002-06-01), Drescher

Affiliated with

Also associated with

Rating

UV transmittance measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4030034