[Alt-photo] Alt-photo-process-list Digest, Vol 172, Issue 12

Keith Schreiber keith at jkschreiber.com
Wed Sep 6 21:00:26 UTC 2017


From what I can tell, all of the other UV meters measure intensity rather than dosage (or cumulative exposure). It's more like an integrator, but not connected to the light source itself. 

Keith 

Keith Schreiber
jkschreiber.com




> On Sep 6, 2017, at 2:31 PM, Niranjan Patel via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> 
> 
> Hi, everyone:
> 
> Just curious....how is this UV light meter different from many off-the-shelf ones out there that can be bought - specs, quality, price?
> 
> :Niranjan
> 
> 
>      From: Greg Brophy via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
> To: alt-photo-process-list at lists.altphotolist.org 
> Sent: Wednesday, September 6, 2017 9:18 AM
> Subject: Re: [Alt-photo] Alt-photo-process-list Digest, Vol 172, Issue 12
> 
> Hi Kees, 
> 
> Thanks for that. That may have been true with the sensor he used. Most UV sensors out there are do not read UV light, they make a calculation based on total light, I think there are new ones that only read UV light and reach their peak at 355n. I will probably keep trying to make it out of sheer curiosity, but I will also buy one as well from Ian since the whole reason I started this was because I wanted one. 
> 
> Greg
> 
>> On Sep 6, 2017, at 8:00 AM, alt-photo-process-list-request at lists.altphotolist.org wrote:
>> 
>> Send Alt-photo-process-list mailing list submissions to
>>     alt-photo-process-list at lists.altphotolist.org
>> 
>> To subscribe or unsubscribe via the World Wide Web, visit
>>     https://mailman-mail5.webfaction.com/listinfo/alt-photo-process-list
>> or, via email, send a message with subject or body 'help' to
>>     alt-photo-process-list-request at lists.altphotolist.org
>> 
>> You can reach the person managing the list at
>>     alt-photo-process-list-owner at lists.altphotolist.org
>> 
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Alt-photo-process-list digest..."
>> 
>> 
>> Today's Topics:
>> 
>>   1. Re:  Exposure Unit (Kees Brandenburg)
>>   2.  UV exposure meter: answer from Ian Parker,    lightmeasure.com
>>       (Kees Brandenburg)
>>   3. Re:  UV exposure meter: answer from Ian Parker,
>>       lightmeasure.com (Philippe Ayral)
>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Wed, 6 Sep 2017 09:10:13 +0200
>> From: Kees Brandenburg <workshops at polychrome.nl>
>> To: alt-photo-process-list
>>     <alt-photo-process-list at lists.altphotolist.org>
>> Subject: Re: [Alt-photo] Exposure Unit
>> Message-ID: <F4D523E8-7E87-445D-8E28-8418776D04A1 at polychrome.nl>
>> Content-Type: text/plain; charset=utf-8
>> 
>> The lightmeasure meters use a set of high & low pass UV filters above the sensor to narrow the spectrum.
>> 
>> -k
>> 
>> 
> 
> _______________________________________________
> Alt-photo-process-list | altphotolist.org
> 
> 
> 
> _______________________________________________
> Alt-photo-process-list | altphotolist.org



More information about the Alt-photo-process-list mailing list