| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Just noting also a big round up of notes on humidity and fog with optical sensors here: https://publiclab.org/questions/sarasage/08-10-2021/is-the..." | Read more » | over 3 years ago | |||
| hansley10 | "Thanks for sharing these great tips about blog commenting. Keep up the great work. best server for small business " | Read more » | over 3 years ago | |||
| laxmiassociates | "Very informative. Information is detailed in a comprehensive way regarding oil testing. Insightful. Thank you for this. " | Read more » | almost 4 years ago | |||
| warren | "@guolivar have you read over these reports and do they factor into your assessment of the Purple Air? Thank you both! " | Read more » | about 6 years ago | |||
| warren | "This is a GREAT post. Thank you so much!!! " | Read more » | about 6 years ago | |||
| warren | "Ah, yes, confirmed by @guolivar's post: https://publiclab.org/notes/guolivar/01-08-2018/thoughts-on-low-cost-air-quality-sensors " | Read more » | about 6 years ago | |||
| warren | "Quick update - the sensor in the Purple Air seems to be this one or one very similar, a laser based sensor with a fan -- the PMS5003 -- $30 shippe..." | Read more » | about 6 years ago | |||
| stevie | "Hi @BrandonFeenstra ! I had a group asking me about the Dylos this morning, so I went to the AQMD website and found the report for it like the one ..." | Read more » | about 6 years ago | |||
| GreenFrogg | "I don't have experience with the Purple Air. The page is an overview made by the Dutch institute of environmental health (RIVM). They coordinate. Y..." | Read more » | about 6 years ago | |||
| stevie | "@GreenFrogg I was checking out your list of sensors on this page and didn't see the Purple Air. Have you worked with it? what are your thoughts on..." | Read more » | about 6 years ago | |||
| liz | "This is so useful! Another imaginative concept brought to real world utility by Chris Fastie. If I ever have a well, I will install this to learn a..." | Read more » | about 6 years ago | |||
| warren | "Tremendous! :tada: " | Read more » | about 6 years ago | |||
| amirberAgain | "Si-based cameras (as the ones used in smartphones) have a very low sensitivity over 950nm and virtually none over 1000nm, so it is very unlikely. I..." | Read more » | almost 7 years ago | |||
| aldehyde | "Hey folk, What kind of Framework (for Participatory PM2.5) can use for creating monitoring cities? " | Read more » | almost 7 years ago | |||
| guolivar | "I tried to put a long answer here but it kept throwing errors so I wrote a note with my thoughts on this issue: https://publiclab.org/notes/guoliv..." | Read more » | almost 7 years ago | |||
| warren | "Wig Zamore also chimed in on the mailing list: Hi Jeff - My guess is that if Weather Underground and EPA and CARB have been involved the product i..." | Read more » | almost 7 years ago | |||
| BrandonFeenstra | "If you would like to learn more about Air Quality Sensors and their performance against regulatory instrumentation, I would recommend a visit to th..." | Read more » | almost 7 years ago | |||
| maltheR | "Thanks for the info... I was looking for it myself.. And big up for your photos, sir.. " | Read more » | over 7 years ago | |||
| stoft | "BTW .... the comments about LED 'voltage' perspective do not seem inline with LED parameters. With LEDs, it's not the voltage, it's the current you..." | Read more » | over 8 years ago | |||
| warren | "Thanks, Dave, good to know. I'd sort of imagine it's a monochromator, like a reverse-spectrometer, using masking and a diffraction grating to gener..." | Read more » | over 8 years ago | |||
| stoft | "Note: Their UV source was a PTI LS-100 fluorescence spectrophotometer -- no longer sold. From a google books print, it sounds like a variable-wavel..." | Read more » | over 8 years ago | |||
| warren | "Ah, thanks for the download tip. OK, that's really interesting to see that lower excitation wavelengths create more variable/distinct emission spe..." | Read more » | over 8 years ago | |||
| stoft | "Note: The article can be downloaded w/o signing up using the 'Download Full Text' button at the upper right of the image frame on the web page. Fr..." | Read more » | over 8 years ago | |||
| warren | "Another thing that 1995 paper could tell us is why they chose 30nm as the offset to discard above the excitation wavelength, and more about the lig..." | Read more » | over 8 years ago |