| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| wu_ming2 | "I posted a related question awaiting approval but may be more useful to follow up here. I am trying to estimate the error for PA2.5 values as prov..." | Read more » | almost 6 years ago | |||
| lincomatic | "Some anecdotal evidence.. I've built my own PM2.5 monitor using the PMS5003, and have found it to be very resistant to influences of high humidity,..." | Read more » | about 6 years ago | |||
| warren | "Hi, any updates on the high humidity tests? Thank you! " | Read more » | about 6 years ago | |||
| warren | "@warren awards a barnstar to guolivar for their awesome contribution! " | Read more » | about 6 years ago | |||
| lincomatic | "thank you for the super detailed summary! " | Read more » | over 6 years ago | |||
| Kelemeh | "Hello btbonval! Thank you for sharing this project with us! I really liked it. I'm a beginner with Arduino and I would like to make a monitoring to..." | Read more » | almost 7 years ago | |||
| aldehyde | "Hi. What kind of Framework (for Participatory PM2.5) can use for creating monitoring cities? " | Read more » | almost 7 years ago | |||
| liz | "This is so helpful and readable -- a gift! thank you! " | Read more » | almost 7 years ago | |||
| cfastie | "Do you have access to an Arduino to try with the DHT21? You might be able to confirm that the sensor is working or learn that the sensor is the pro..." | Read more » | over 7 years ago | |||
| guolivar | "You're right, the effect of humidity would be to change the "apparent" size but it's not just increasing the number of particles that now fall in t..." | Read more » | over 7 years ago | |||
| jeffalk | " My quick perusal of the attached pdf didn't find anything about effects of humidity. What you say about humidity effecting size makes sense but ..." | Read more » | over 7 years ago | |||
| stevie | "Hi Jeff, thanks! This is great. I'll copy the question link into that email chain as well. Think some of the readers there would be interested, it'..." | Read more » | over 7 years ago | |||
| stevie | "Wow. These are awesome resources!! Thanks for clarifying the seeing/sizing distinction. " | Read more » | over 7 years ago | |||
| guolivar | "Yes, environmental conditions do affect the ability of an optical sensor, not too much to "see" a particle but rather to "size" it. All of these o..." | Read more » | over 7 years ago | |||
| jeffalk | " Yes is the simple answer: high humidity and/or moisture can effect particulate counts by raising them. Once you accept this the next step is how..." | Read more » | over 7 years ago | |||
| kinasmith | "I am also very curious how much temperature affects the batteries in very low current applications. I haven't found good documentation about that. ..." | Read more » | over 8 years ago | |||
| cfastie | "This is probably not the best data set to do calculus on. The air temperature data is from a sensor in a jug suspended above the pile, and the batt..." | Read more » | over 8 years ago | |||
| donblair | "Yay, data!! Neat observation about the battery voltage and the temperature. Makes me want to compare the rate of battery voltage drop to the temp..." | Read more » | over 8 years ago | |||
| kinasmith | "Nicely done, and nice temps for such a small pile too! I'm curious to see how long they can sustain that heat. I've done some work with compost in ..." | Read more » | over 8 years ago | |||
| david-days | "I imagine so (regarding the grass). If it's fairly fresh, there's probably enough water content to feed the bacteria as things break down. We use..." | Read more » | over 8 years ago | |||
| cfastie | "Thanks David, I wish I had some of your manures to spice up my pile. I'm surprised at how hot this pile is without the addition of any N-rich mater..." | Read more » | over 8 years ago | |||
| david-days | "Excellent work, @cfastie! I live on a farm in Ohio, and we use cleanup from the chicken house and the horse/goat barns to make our compost piles. ..." | Read more » | over 8 years ago | |||
| cfastie | " I kinda like the switch on the Riffle and now I know that it is something to pay more attention to. But I guess it adds much more complexity that ..." | Read more » | over 8 years ago | |||
| donblair | "Chris, This is such a beautiful project! The lapse rate calculation is so fun to see. Quick reactions: That power switch goof is annoying. I w..." | Read more » | over 8 years ago |