| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Thank you for the links and the explanations!!! " | Read more » | about 2 years ago | |||
| warren | "Hmm... I guess it seems like a tough setup for my skill set. What does the microwave version look like? " | Read more » | about 2 years ago | |||
| warren | "https://www.sciencedirect.com/science/article/abs/pii/0039914070800819 " | Read more » | about 2 years ago | |||
| warren | "Interesting. It's like a high power version of this? https://www.ebay.com/itm/324819370181 Does this take high voltage to run? " | Read more » | about 2 years ago | |||
| warren | "I wonder how the Hound is used if it needs a reflector to bounce the beam back. maybe you have to be on 2 sides of a site? You can be 1000' or more..." | Read more » | over 4 years ago | |||
| warren | "Sure! I think the takeaway is that searching for a price for the OPSIS, or pricing for a different UV-DOAS device that could substitute for the UV..." | Read more » | over 4 years ago | |||
| warren | "Deep UV or DUV is pretty hard to detect. This article talks about it: https://www.vision-systems.com/non-factory/life-sciences/article/16736672/uv-..." | Read more » | over 4 years ago | |||
| warren | "Hi, just found it interesting when i read about the UV Hound - it's actually not a mass spectrometer but an optical spectrometer not too dissimilar..." | Read more » | over 4 years ago | |||
| warren | " I think it's possible to do fluorescence testing with soil if you do an "extraction" from the soil. You can find a lot more about this (maybe too ..." | Read more » | about 5 years ago | |||
| warren | "What I did to compare is to calibrate on a CFL, then scan a tube fluorescent, so that the methodology for calibration is the same: https://spectra..." | Read more » | almost 8 years ago | |||
| warren | "Actually this looks calibrated, no? " | Read more » | almost 8 years ago | |||
| warren | "that continuous band on the blue spectrum gives poor calibration Dave, I don't think it's quite accurate to say that they give poor calibration. T..." | Read more » | about 8 years ago | |||
| warren | "Can you try re-calibrating this one, as I think it was calibrated during a brief bug (it shows being calibrated on 1/26/16) which was since fixed. ..." | Read more » | about 8 years ago | |||
| warren | "Hi, Matej - it also looks like some of your spectra are not calibrated, or perhaps not properly? I'm seeing some not aligned. But all of them seem..." | Read more » | about 8 years ago | |||
| warren | "Aww, i couldn't wait! Posted: https://publiclab.org/notes/warren/02-19-2016/preliminary-led-and-isopropyl-alcohol-solvent-tests-for-oil-fluorescenc..." | Read more » | about 8 years ago | |||
| warren | "This was a super great event. I have a draft of a followup post about LED and alcohol tests -- will post on Monday, I believe! " | Read more » | about 8 years ago | |||
| warren | "These look good too, and come with a spectrum datasheet: http://www.ledgroupbuy.com/solderless-true-violet-led-405nm/ " | Read more » | over 8 years ago | |||
| warren | "Powered on one of these, with a dial: http://www.watterott.com/de/Wattuino-Nanite85?x56e76=f63b1cee028854c06b93338f2945a806 " | Read more » | over 8 years ago | |||
| warren | "Here's the big list of UV LEDs below 405 nm " | Read more » | over 8 years ago | |||
| warren | "Crap, those are only in quantities of 400+ or 1000+. I'll keep looking. " | Read more » | over 8 years ago | |||
| warren | "@tonyc @ygstcu - looking at higher powered LEDs, I've found: ~$4.40: http://www.digikey.com/product-detail/en/VLMU3500-385-060/VLMU3500-385-060TR-..." | Read more » | over 8 years ago | |||
| warren | "Yes! " | Read more » | over 8 years ago | |||
| warren | "https://github.com/publiclab/plots2/issues/203 " | Read more » | over 8 years ago | |||
| warren | "Thanks, Chris - we were testing a different bugfix -- there were two. This latest change fixed an issue with @callouts not triggering email sends a..." | Read more » | over 8 years ago |