375nm LED PENLIGHT

375nm LED Penlight, retail 99¢
Manufactured by (Unknown)
Last updated 08-25-09




This is a small (penlight-sized) source of long UVA (ultraviolet type A) radiation, peaking at 381.5nm (not the 375nm as advertised).

It comes in an aluminum pen-style body with a 5mm UV LED at the end where you might normally see a pen tip, and it feeds from a single AAA cell. Because of this, there is an inverter circuit inside to boost the ~1.5 volts from the battery to the ~3.7 volts the LED requires.


SIZE



Feed it a single AAA cell first (see directly below), and THEN you can go find that stinky old cat pee or check "invisible ink" hand stamps on customers at the door at that club you're employed as bouncer at.

Press the "pen cap" down until it clicks and then release it to turn the product on; repeat the same action to turn it off.

This "light" comes with a removeable spring steel clip; this allows you to clip the unit into a shirt or pants pocket and subsequently reduce the chances of your losing it. But at just 99¢, if you do end up losing it, no biggie...you need not take a second morgage out on your home in order to procure a replacement.



To change the AAA cell when necessary, unscrew & remove the top of the unit (where the pushbutton switch is), and set it aside.

Tip the "pen" into your hand, and dispose of or recycle the used AAA cell that falls out as you see fit.

Insert a new AAA cell into the barrel, orienting it so that the button-end (+) positive goes in first.

Screw the end cap back on, and be done with it.

Current usage measures 56.6mA on my DMM's 400mA scale.



This portable UVA radiation source appears to be reasonably durable, and it is. When I performed that terrible smack test on it (ten whacks against the concrete floor of a patio: 5 smacks against the side of the bezel and 5 smacks against the side of the tailcap), only some rather minor damage was found. There is some extremely minor gouging to the bare Metalbeezelmon - er - the bare Metalbeetlemon - um that's not it either...the bare Metalmalomyotismon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again! Now I'm just making {vulgar term for poop} up!!! ) on the side of the bezel where it was struck.

No optical or electrical malfunctions were detected.



Beam photograph on the test target at 12".



Photograph of the top of LED Hummingbird Wind Chimes fluorescing.



Photograph of the security strip in a US $20 bill fluorescing.


Spectrographic plot
Spectrographic analysis of the LED in this radiation source.



Spectrographic plot
Same as above; spectrometer's response narrowed to a range of 370nm to 390nm.


Spectrographic plot
Same as above; newer spectrometer software & settings used.


Spectrographic plot
Same as above; newer spectrometer software & settings used; spectrometer's response narrowed to a range of 370nm to 390nm.


Spectrographic plot
Fluorescence of the head of a Mr. Krabs plush (stuffed critter) when irradiated with this product.


Spectrographic plot
Spectrographic analysis of the fluorescence of a uranated* glass marble when irradiated with this product.

*"Uranated" - infused with an oxide of uranium, *NOT* piddled on.
Commonly referred to as "Vaseline glass" because it has
a distinct pale yellow-green color when not being irradiated.

Note spelling: "urAnated", not "urEnated","urInated",
"urOnated", "urUnated", or sometimes "urYnated".
USB2000 spectrometer graciously donated by P.L.









TEST NOTES:
Test unit was purchased on Ebay on 02-26-08 and was received on the afternoon of 02-27-08.


UPDATE: 00-00-00



PROS:



CONS:



    MANUFACTURER: Unknown
    PRODUCT TYPE: Penlight-style UVA radiation source
    LAMP TYPE: 5mm UV LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot w/dim corona
    SWITCH TYPE: Pushbutton on tailcap on/off
    CASE MATERIAL: Metal
    BEZEL: N/A
    BATTERY: 1xAAA cell
    CURRENT CONSUMPTION: 56.6mA
    WATER RESISTANT: Light splatter-resistant at maximum
    SUBMERSIBLE: No
    ACCESSORIES: None
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





375nm LED Penlight *






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