hcho
hcho


Author Comment Last activity Moderation
imdad "This is Very Informative Information About This is Very informative Information About Electrical Energy Definition " | Read more » about 3 years ago
imdad "This is Very Informative Information About This is Very informative Information About Electrical Energy Definition " | Read more » about 3 years ago
hannanahmad "Your points make sense, but still there are only a few building management systems that can comply with old HVAC equipment. Timing of pumps can be ..." | Read more » about 3 years ago
yamanoorsai "In fact, if the analog output is linear, I would not need the meter " | Read more » over 4 years ago
yamanoorsai "Hello, I would be glad to help as long as I get to share my work under an open license with everyone. How does one gain access to the HCHO meter li..." | Read more » over 4 years ago
Bronwen "Apologies for the mass tagging here, I know a lot of you have been in the mix providing great support and advice so far, but if anyone feels they h..." | Read more » over 4 years ago
nshapiro "Hi @indy if you're based in Indiana, as your name hints, you can report your symptoms to the stat DOH and they might come out and test for free. In..." | Read more » over 5 years ago
Indy "Hi, my search for formaldehyde testing brought me to this article. I'm wondering if you could help me with some advice - I'd appreciate it. I'm ve..." | Read more » over 5 years ago
warren "Oh, also just for ref, the idea i posted is here: https://publiclab.org/notes/warren/02-09-2017/a-kit-to-design-your-own-formaldehyde-experiment " | Read more » over 5 years ago
Dave-O "You're welcome, @nshapiro ! Is this the same EPA approved method that you used? https://www3.epa.gov/ttnamti1/files/ambient/airtox/to-11ar.pdf And ..." | Read more » over 5 years ago
nshapiro "Thanks, @Dave-O ! We did some side by side testing of this method next to an EPA approved method and we found these tubes to be cross contaminated ..." | Read more » over 5 years ago
kkoerner "LukeS good to know, thanks for testing out those pumps and posting your results! " | Read more » over 6 years ago
mathew "Great writeup, Luke! cool work. " | Read more » over 6 years ago
LukeS "@kkoerner, I tried a similar pump when I was researching this and it created too much turbulent/pulsed of the air stream to get a good measurement ..." | Read more » over 6 years ago
nshapiro "Great! Thanks for that! Next time just tell me to do that :) I've uploaded it to youtube and embedded it in the note! " | Read more » almost 7 years ago
mathew "Nick, I re-cut your video to 5 minutes as a quicker walkthrough-- what do you think? Public_Lab_Where_We_Breathe-cut.mov " | Read more » almost 7 years ago
btbonval "@nshapiro glad to hear it has been considered! I studied some psychology in college, I learned that if there's anyone who knows how to craft a surv..." | Read more » almost 7 years ago
nshapiro "Hi @btbonval! Thanks for your comment and concern. We have thought a lot about these issues. We are planning to do some randomized monitoring+surve..." | Read more » almost 7 years ago
btbonval "If this is largely done through self reporting and the information is coming from a group that expects such toxins to be present, I have two very s..." | Read more » almost 7 years ago
nshapiro "@kkoerner Hi Karl! Great find! It would be fantastic if you could request a quote on these. We are planning on have a lending library of these tool..." | Read more » about 7 years ago
kkoerner "Any thoughts on using a smaller pump? If you're only trying to draw 0.3 SLPM, there are a couple of pumps (see the attached datasheet and catalog) ..." | Read more » about 7 years ago
danbeavers "It appears you need some more ventilation or perhaps start using the remediation process. http://publiclab.org/notes/nshapiro/10-20-2014/diy-indoo..." | Read more » about 7 years ago
mathew "Just repeated this test today at 26 degrees, and temperature corrected we got 25ppb. So good news: consistency. Bad news: consistently hazardous c..." | Read more » about 7 years ago
mathew "I ran a formaldehyde test over by our shipping station, now that the flow on our lending kit is calibrated. We got 26ppb, or about 3.5x the chroni..." | Read more » about 7 years ago