This may look dumb but... Any of you have a UV led flashlight and a cat?

C

cybrok

Joined
Aug 7, 2005
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Just for a small test.

A friend of mine want to become a legist. She asked me if there were small and easy to carry lights emmiting UVs.

Most of human secretions reacts to UV light and kind of "glow". So it is for cat urine.

So... next time your cat go for it, could you... just light the puddle and tell me if it glows?




Thanks.
 
Supposed to be true, BTW orange filter goggles will improve contrast.
 
I have a UV light to be able to find cat pee on carpet. Luckily I have never had to use it, but I can say that human secretions do not glow:D
 
Spyder10, you might want to go to a doctor and get that checked out. I don't know what could cause your urine not to fluoresce but your doctor probably knows....

I don't have a UV led; I have the Coleman fluorescent flashlight that comes with a white tube and a UV tube. Urine, blood, dandruff glows very brightly, a lot of clothes glow, some rocks ...
 
I have the Inova X5T in UV. It's fun lighting up labels and high-visibility orange stuff. Fingernails glow nicely, too. Some G-10 lights up.
 
Some "extra whitening" toothpastes and laundry detergents contain flourescent dyes that give you that extra sparkle when you use them.
 
Cougar Allen said:
Spyder10, you might want to go to a doctor and get that checked out. I don't know what could cause your urine not to fluoresce but your doctor probably knows....

I don't have a UV led; I have the Coleman fluorescent flashlight that comes with a white tube and a UV tube. Urine, blood, dandruff glows very brightly, a lot of clothes glow, some rocks ...
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There are acually two different types of UV light, UVA and UVB. Most lights are UVA and they do not make substances "glow" as bright as UVB. Since my light is about 10 LEDs, and I would guess it is UVA, that is the most likely reason my urine does not "glow".

Edit: IIRC What fluoresces in you urine is phosphorus, so a phosphorus deficiency would cause urine to not fluoresce.
 
Cougar Allen said:
Spyder10, you might want to go to a doctor and get that checked out. I don't know what could cause your urine not to fluoresce but your doctor probably knows....
Click to expand...

I'd love to hear that conversation.

Doc: What's the reason for your visit?

Patient: Well Doc my urine is not flourescent.....

Oh to be a fly on the wall ;)


:D:D
 
I have an Inova X5 UV light that I use at the bar I work at. I can assure you UV does not cause urine to glow. However, it does work on uh...whiter substances.
 
You have to actually pee on your carpet for it to glow. :eek:

Test it out-you will see it glows better than in the toilet.;)
 
the white porcelain reflects back so much of the light.
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I think that's what's causing the confusion here. Fortunately for trackers, there is no white porcelain in the woods.
 
Another large factor to consider here is that not all UV lights are producing light in the same wavelength. Different sections of the spectrum fluoresce different materials, and the 395nm wavelength of the X5-UV is not well suited for urine detection: you want 380nm for that.

The Application Matrix is a good source of info here, but note that the 395nm xLamp is referencing a product from the manufacturer's site and is different from a normal 395nm light (which is in the adjacent column).
 
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