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particulate
particulate


Author Comment Last activity Moderation
jeffalk "Nice "sanity check" for pm "real time" monitors. I'd suggest it is always good practice when testing to make use of original data, in the case of..." | Read more » over 4 years ago
zengirl2 "@warren Cool experiment. So your dip in the top graph--do you think that is expressing less traffic due to start of holiday or is it raining there? " | Read more » over 4 years ago
warren "OK, I'm removing the cover now, wow that seems to have worked! " | Read more » over 4 years ago
warren " OK, it's every 10 minutes, and I just covered it: " | Read more » over 4 years ago
warren "I can try this right now, at the Providence Purple Air sensor: https://www.purpleair.com/map?#12/41.8091/-71.4266 " | Read more » over 4 years ago
GreenFrogg "If its still a point. From my archive. The project I am involved in has changed to the SDS011. " | Read more » over 4 years ago
warren " " | Read more » over 4 years ago
warren " " | Read more » over 4 years ago
jiteovien " " | Read more » over 4 years ago
warren "Maybe @GreenFrogg might also have an idea? @jitovien could you post a pic of the case open as you received it in the mail? " | Read more » over 4 years ago
xose "Hi! As I understand the sensor needs to be vertical and inside a ventilated dark case but I'm not sooooo sure. " | Read more » over 4 years ago
jiteovien "Question for @Schroyer , @Willie , @imvec , @nanocastro , @jefffalk or anyone else who is able to answer this question - I understand that the Shin..." | Read more » over 4 years ago
warren " " | Read more » over 4 years ago
warren "Great, also linking back to this prior post! https://publiclab.org/notes/mathew/04-22-2014/frac-sand-mining " | Read more » over 4 years ago
warren "Adding a reference here - this looked pretty cool! https://www.reddit.com/r/microscopy/comments/8giinz/plm_red1_polarized_light_to_dso_chrysotile/..." | Read more » over 4 years ago
warren "Note these prior questions related to this one: https://publiclab.org/notes/mathew/10-07-2016/sizing-images-at-portland-science-hackday And this,..." | Read more » almost 5 years ago
warren "This blog is by someone who works for an energy company, helping to mine frac sand, and publishes a book called "Finding Frac Sand" -- yikes. The ..." | Read more » almost 5 years ago
warren "TXSharon posted this note about photographs of sand dust from a sandbox: http://www.texassharon.com/2012/07/31/take-this-nice-fracking-sand-for-yo..." | Read more » almost 5 years ago
aldehyde "Hey folk, What kind of Framework (for Participatory PM2.5) can use for creating monitoring cities? " | Read more » about 5 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 » about 5 years ago
liz "Fascinating! " | Read more » about 5 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 » about 5 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 » about 5 years ago
GreenFrogg "@ Warren, I will try to make a blog. Have to make time :-). There are a lot of differences with the measurements last year. Several different (and ..." | Read more » about 5 years ago