UV Detection Equipment
by Bruce Beach
Radiological Scientific Officer
UV Detection Equipment
The criteria that I have established for selecting proper instrumentation is as follows:
2. is not overly complicated and directed towards scientific uses
3. is not difficult to maintain and calibrate
4. is not too simplistic so that it will give us a meaningful scale
5. is not too limited in its scale so that it may not respond to the high ranges about which we are speculating as to occurriing
6. is hardened so that will not be damaged by those high ranges
7. is not overly delicate so that we can use it in the hazardous situation that we anticipate
8. ideally the equipment would be either EMP hardened or not EMP sensitive, however there are other solutions for dealing with EMP.
Professional equipment is too expensive for my pocket book (between two thousand and fifteen thousand dollars) and is often too complicated to use.
After that, a photo-cell converts UV light to an electrical impulse, which travels along a cable to a recorder inside the building. Then, the recorder measures UV intensity as minimal erythema dose (MED). ( MED represents how long it takes the skin to begin burning, and erythema is the reddening of the skin caused by the dilation of blood vessels.) Finally, MED is recorded as a numeric value on a scale from one to 10+.
A source for this type of equipment is:
You might try to build your own -
Nevertheless, here are some directions -
but I really doubt that this will work out.
You can see the difference between inside and outside
I have no idea how one would calibrate them.
I don't know how many you will get for $11.95 but it will probably be a bunch.
You could have a problem if, as another supplier says, they are subject to Hazardous Materials surcharge and require special packaging and/or must be shipped by motor freight.
Check them out at:
Rainbow Symphony, Inc.
6860 Canby Ave., Suite 120
Reseda, California 91335
800 821-5122 - 818-708-8400
Measure ultraviolet light intensity
Watch the scale!
A simple, reusable, credit card size device that indicates the ultraviolet light intensity.
The UV Card measures the strength of UV light (in about 20 seconds).
Good price - but I don't know -
Dose: 0 ÷ 99 MED
Accuracy: 15% (3 ÷ 15UVI); 20% (0 ÷ 3UVI)
Basic Mode: Erythemal UV Intensity, Erythemal UV Daily Dose
Dimensions: 4.6” x 2.0” x 0.9” (115 x 51 x 23 mm)
Weight: 5 ounces (140 g.), with batteries.
(hours) switched off 1800 (standby mode)
Operation humidity: 0 ÷ 95%, non condensing
Construction: ABS plastic
Battery Type: two CR2430 lithium batteries (equivalents: DL2430, 5011LC)
I am told that the batteries are readily available at places like Radio Shack
and one would want to stock a bunch of them - looking at those usage times.
The other thing is that I need to check out further
is the correlation between the scales and our charts and needs.
I think we could get these for about $100 each
as a group buy.
That would include delivery to the individual members.