Ultrafire 501B UV 365nm Flashlight (1*18650/2*16340) Quick review

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arenat
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Ultrafire 501B UV 365nm Flashlight (1*18650/2*16340) Quick review

http://kaidomain.com/ProductDetails.aspx?ProductId=11095

Receive in two weeks, pretty good timing nowadays..

As the 501B host is over-reviewed the only thing to note  is that came with coated lens , all fine, orings , lubed , finish etc... nice first P60 host to play with plenty of spare things around here. Busy weekend at sight.

The dropin look very well made and assembled with the emitter glued onto the pill.

 

As the pic show has OP reflector .The other is an empty received yesterday aimed at pill for a Mini Maglite Match's easy mod.

Draw 240 ma from an 18650 , that's a bit less than 1W , 800-750mW at the emitter.

 

Emitter close up..

 

Below a pic from the 395-400 nm emitter also sell at KD. This one is on a C78 zoom to throw which is perfect and the same host is waited for the 365 one.The stock drivers 1.2V AA powered  of those is perfect for this emitter also the heat dissipation could be enough with little to adjust.

http://kaidomain.com/ProductDetails.aspx?ProductId=8813

Below the 365 nm

 The pis are taken with plenty of ambience light...

I'm feeling ill because writing as a five years old is tiresome as hell...hahah

Edited by: arenat on 04/18/2011 - 08:43
Haggai
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Ah, so it's about the same emitter and the same power as my Tank007 TK-566 1W 365nm... Sad

Such a pity it isn't a 3W emitter.

Still, a better deal than the tk-566, same power same emitter, 40% less money.

arenat
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The emitter look exactly as this Taiwan 3W 380 nm .Wonder if can be pushed a little more around 350 ma with a boost driver from an AA  light , 1.5W...hope the pic at that site is correct .The Budgeteer's review say 450 ma 1.75W..

http://www.manafont.com/product_info.php/taiwan-3w-380nm-uv-flashlight-d...

Haggai
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The tank and the taiwan use the same emitter.

There is a 3W version of it in the tank PD30 365nm, which is basically three such emitters under one dome. The flashlight is three times more expensive than the tank tk-566 at almost 100$ (sans customs).

 

I'm really tempted to try this one out: http://il.mouser.com/Search/ProductDetail.aspx?R=LZ1-10U605virtualkey62410000virtualkey897-LZ110U605

But the price... a little too high for a toy like this. Smile

arenat
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I think it is a 3W emitter or very close if not. I fed it with the power supply beyond 1A with no apparent harm or swift in the output. Never thought that some day I would need a multimeter with back light, this hobby is very demanding .lol

The issue here is the high Vf of this kind of diodes;

200 ma    3.956 Vcc

500  ma   4.345 Vcc        2.1W     

700 ma    4.650 Vcc       3.25W     

1000 ma        5 V cc           5W

They are very tricky to drive with one cell , being 18650 or 1.5 ones , there are not standard driver to do it well. The linear don't work because the Vf is way more than nominal 3.7...the bucks don't also .

The stock with take 2 16340 do it because strangely is a voltage regulator working as buck driver , with a bit more than 6V work fine..

Probably  will work forever at 3W if well cooled as in a RC-G2 host.

Lets see if those boost can led 700 at 4.35 V with a rechargeable ...i have four differents stocks ones to experiment. I¡m a big fan of one cell powered ones..

arenat
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Well, it's way more difficult than I thought at first.

I was wrong , the stock driver led only around 120 ma with 7.2V two 14500 in series. You can't properly check drivers with the power supply.

The stocks boost drivers one AA'  tried give at the most near 200 ma as the buck with 18650.

18650                        Vf    3.96 Vrms

14500x2                     Vf  3.36 Vrms

P-31               1.2 V    Vf  3.69 Vrms

C78 (moded)  1.2 V    Vf 3.87 Vrms   

C78                2.4V     Vf 4.54 Vrms     3W

G10                1.2 V    Vf 3.60 Vrms

The emitter was re flowed in a standard 20mm star filed down. To make things worst the case is electrical connected to minus pole ...

 

Pic below at 3W without reflector.

 

Ordered one C78 double cell as last option...

http://priceangels.com/X2000_Super_Bright_Zooming_Aluminum_Alloy_LED_Fla...

 

The P60 drp-in has now an AK-47 with a actual XR-E R2 , nice beam with the OP reflector.

 

 

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Haggai wrote:

The tank and the taiwan use the same emitter.

There is a 3W version of it in the tank PD30 365nm, which is basically three such emitters under one dome.

 

I couldnt find this light or any mention of it. Can you provide a link? Thanks.

arenat
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Haggai
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FlashPilot wrote:

Haggai wrote:

The tank and the taiwan use the same emitter.

There is a 3W version of it in the tank PD30 365nm, which is basically three such emitters under one dome.

 

I couldnt find this light or any mention of it. Can you provide a link? Thanks.

Sorry, I meant the PT30:

http://www.candlepowerforums.com/vb/showthread.php?311637-Need-help-in-identifying-UV-LED-(advertised-as-Nichia-seems-not-one)&p=3612571&viewfull=1#post3612571

http://www.tank007store.com/products/TANK007-PT30-2%2ACR123-or-1%2A18650%28Li%252dion%29-3W-365nm-UV-flashlight.html

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PT30... thanks. The $100 price drew my attention. This would have been a steal if Tank hadnt blatantly lied about the nichia emiter. Also thanks for the CPF link. As stated, "The NCSU033B has a single emitter and a four emitter version is available as NC4U133. Nichia doesn't make these UV LEDs in a three emitter version." Thats all I needed to know. It seems that the 365nm version 501 at Kai is still fairly good for the price and for what you get. I had intended this for aircraft engine inspections when looking for oil leaks. The flood beam of a true quad nichia for $100 just sounded to good to be true.

Haggai
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I've seen many fluorescent lamps (4w or 9w) for very low prices.

Maybe they can help?

I have no idea how strong is their beam, but it's probably much more floody than the LEDs.

 

Oh, and Tank007 also have a 3W TK-566 version, but I wouldn't count on it to be stronger than the Kai's offering.

mfm
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Haggai wrote:

Oh, and Tank007 also have a 3W TK-566 version, but I wouldn't count on it to be stronger than the Kai's offering.

It's also expensive, and from what I see it only has two emitters not three (so I wonder how they can call it 3W...). But it would be interesting to compare the KD drop-in with the 556.

Haggai
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mfm wrote:

Haggai wrote:

Oh, and Tank007 also have a 3W TK-566 version, but I wouldn't count on it to be stronger than the Kai's offering.

It's also expensive, and from what I see it only has two emitters not three (so I wonder how they can call it 3W...). But it would be interesting to compare the KD drop-in with the 556.

I never saw a photo of the LED - do you have a link?

mfm
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Haggai wrote:

mfm wrote:

Haggai wrote:

Oh, and Tank007 also have a 3W TK-566 version, but I wouldn't count on it to be stronger than the Kai's offering.

It's also expensive, and from what I see it only has two emitters not three (so I wonder how they can call it 3W...). But it would be interesting to compare the KD drop-in with the 556.

I never saw a photo of the LED - do you have a link?

Haggai
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Interesting. 

I wonder if they also managed to squeeze four emitters into another version... Smile

It's quite mysterious how no one knows what this LED is, while it is so ubiquitous.

If only the pictures in alibaba/taobao were of better quality... Undecided

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Nichia NC4U134 through NC4U134

 

Product sheet: http://www.nichia.co.jp/en/product/uvled.html

Data sheet: http://www.nichia.co.jp/specification/en/product/led/NC4U133-E.pdf

It looks like the group buy attempt going around the forums never came to fruition.

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Considering Nichia is reportedly getting $223 for the quad LED and a custom high voltage driver would be needed to complete the build, this might be a good alternative.

http://cgi.ebay.com/Extreme-Intensity-True-365nm-UV-Ultraviolet-Flashlight-/120719552069?pt=US_Flashlights&hash=item1c1b722e45

Who's going to be the first to buy and review one? Yell

dorpmuller
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FlashPilot wrote:

Considering Nichia is reportedly getting $223 for the quad LED and a custom high voltage driver would be needed to complete the build, this might be a good alternative.

http://cgi.ebay.com/Extreme-Intensity-True-365nm-UV-Ultraviolet-Flashlight-/120719552069?pt=US_Flashlights&hash=item1c1b722e45

Who's going to be the first to buy and review one? Yell

 

That's for CPF rich guys...

"I am the flashlight king! I can light anything!"

mfm
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gorann wrote:

And whats with Ultrafire 501b UV on dx? It is 395-400nm. KD is 365nm, supposedly. Would it be good (r approximately good) as this from kd. Here is the link: http://www.dealextreme.com/p/ultrafire-wf-501b-3w-uv-395-400nm-led-flash...

Depends what you want, but 395-400nm isn't as good as 365nm for most purposes. I was interested in the KD drop-in but I got the Tank007 PT30 instead.

Forgetful
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I run mine off a 18650. here are some pics I took. it's really had to get accurate representatives since the camera picks up UV. I find that some bills will also show up but not all. The wavelength is too close to visable IMO. I'd like a 365nm emitter, but the good news it the output is pretty good as is. I'd hate to have it driven less. Sorry about the links, I've never been on a site that used HTML for pics [IM59-1.jpg[/IMG]

mightlight
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Details

Ultrafire 501B UV 365nm Flashlight(1*18650/2*16340)

Brand:Ultrafire

Mode:501B Wave

length:365nm

Battery type:1*18650/2*16340

Emitter: UV 3-Lumen

 

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ackbar
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Really tempted to snag a few of these from KD to salvage the emitter.

 

Does anyone know the wavelength of the two UV dropins from Manafont?

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I ordered the 365nm 501B from Kaidomain. Now I wonder... is it useful to run it on two CR123A's? KD suggests it should work but I don't know about the driver.

I don't really feel like getting into Li-ion cells for just this one little-used light. Or is this light only useful if modded?

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So I got the KAIdomain 501b light, but didn’t want to bother with Li-ion batteries.

I measured with a power supply, but it seemed that 2 x CR123A would lead to huge overcurrent.

So I bought SKU 128084 from Dealextreme – which the sent to me incredibly quickly BTW, and I started to work.

First, this is a pair of step-up regulators. You need to saw them apart as the PCB is not scored or anything.

I soldered the red and black wires to the inner spring and the outside of the PCB, respectively. I cut some PVC tubing to support the step-up PCB in place, and used a slightly larger PVC tube to keep my AA in the center of the light.

The 5/8” and 3/4” PVC tube work fine for this – the 3/4” fits nicely into the 501B holder, and the 5/8” fit on the back of the pill and hold the tiny DX pcb.

There was no need to bypass the “regulator” inside the 501B (is there any???) , The light works fine, it is pretty focused, and in the center it shows the same amount of light as the much less focused 395 nm 2-AA light I have. That is with the original glass in place.

The 365 nm light shows the red fibres in 20 euro notes, which my 395 nm light does not.

texaspyro
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One thing that you need to watch out for is the lens in it. I got a 365nm light with apparently a normal lens… it does a wonderful job of blocking UV light. You really need a quartz lens to get the most out of these… probably no lens is even better.

And watch out for coated lenses. If the coating is not engineered for the short wavelength it can block UV light very effectively.

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texaspyro wrote:
One thing that you need to watch out for is the lens in it. I got a 365nm light with apparently a normal lens... it does a wonderful job of blocking UV light. You really need a quartz lens to get the most out of these... probably no lens is even better. And watch out for coated lenses. If the coating is not engineered for the short wavelength it can block UV light very effectively.

Thanks for the reminder, I've totally forgotten that regular glass blocks UV very well. I guess I should build one without glass then. 

Just curious, how about plastic lens and UV?

texaspyro
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Pulsar13 wrote:
Just curious, how about plastic lens and UV?

Usually it’s a better UV filter than glass…

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I removed the glass – thanks to my new two-step driver glued construction this is not harder than before – and tested.

There does not seem to be much difference. Placing and removing the glass does not make an immediate difference.

So I put the glass back. The ring that holds the glass in place has a little rim on the inside – keep that against the glass or the reflector will not fit.

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I am still trying to understand the descriptions and capabilities of a UV LED. I am tempted to get a UV drop-in from MF or somewhere for my P60 hosts because I live in Arizona and dig hunting scorpions, and like the idea of having a powerful UV torch with more throw than the 7-LED cheapo 3x AAA crap light I got from Amazon for $6.

Can someone back up just a bit and explain some of the terminology in the thread and give me a hint on how to judge the usable distance a 18650 powered UV LED can throw? I assume it will be more than the three feet my cheapo light can do, but maybe I’m assuming too much?

Thanks guys,

JAFFO

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I’d guess that LED efficiency is about the same, so a 1 watt power LED (which is what you can expect) is 10 times brighter 5 mm 100 mW LED.

The reflector van change a lot. The KD 501B has a pretty narrow beam.