| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| jhondue123456 | "https://www.google.com/ " | Read more » | 9 months ago | |||
| ethaniel | "I used your manual to clean my Purpleair PMS5003 sensor. Ended up messing both of them up (sensor values didn't match by a large margin) - it's alm..." | Read more » | almost 3 years ago | |||
| AnemometricalTwoStep | "+1 One of the channels in my PurpleAir started reporting a value of 0 constantly. I suspect I’m going to have to take it apart and replace or clea..." | Read more » | over 3 years ago | |||
| eustatic | "How was the sensor malfunctioning? was it reading zero? I debating whether to unpack a purpleair, but it doesn't seem to be malfunctioning in the..." | Read more » | about 4 years ago | |||
| eustatic | "I found this post from 2017 azchrisf Posts: 240 Copperwood WX Re: personal air pollution sensor « Reply #35 on: December 25, 2017, 11:21:08 AM..." | Read more » | over 4 years ago | |||
| eustatic | "I 'm having trouble with the PVC case, wondering if you've taken that apart before getting to the blue box " | Read more » | over 4 years ago | |||
| asampra | "I did this! Don't forget the springs. There are 3 sizes and four springs. So far the device corresponds to a duplicate system. Was reading very ..." | Read more » | almost 5 years ago | |||
| lord_of_all_sebastian | "Haha yeah it was very surprising. Before I opened it I figured it was just a little dust. " | Read more » | over 5 years ago | |||
| liz | "haha! Were you surprised??? " | Read more » | over 5 years ago | |||
| lord_of_all_sebastian | "I had the same exact problem with my PMS 7003 sensor! I was getting suspiciously high particulate matter readings on a very clear day. I found this..." | Read more » | over 5 years ago | |||
| kkoerner | " Sure thing, I'll see if I can get something written up within the next week. " | Read more » | over 5 years ago | |||
| liz | " Hi @kkoerner, you wrote above that "Taking apart a PurpleAir and swapping out sensors is relatively easy, if there's a desire for a similar guide ..." | Read more » | over 5 years ago | |||
| warren | "Love this! " | Read more » | over 6 years ago | |||
| nshapiro | "This is great, Karl! So many people are using the PMS 5003 these days and probably wondering how to do this. I'm looking forward to circulating th..." | Read more » | over 6 years ago | |||
| zengirl2 | "@kkoerner so cool to see this post as well as the guts of the air sensor. Looking forward to the update on the results. " | Read more » | over 6 years ago | |||
| danbeavers | "So I can't spell and the spell check did not help much. Another thing to do is just appropriately scratch a small area on a fully reflecting mirro..." | Read more » | almost 12 years ago | |||
| cfastie | "Dan's right that it's a monochromator in that it directs light of one color (a narrow band of wavelengths) through the sample and to the detector. ..." | Read more » | almost 12 years ago | |||
| warren | "Wait, you think that it hits the sample with a monochromatic light source? I guess we could easily test that with a mirror, as you describe. That'd..." | Read more » | almost 12 years ago | |||
| danbeavers | "It finally dawned on me that this machine is a monochronomater, attenuater, and photometer. To use it that way all you need to do is to bring out ..." | Read more » | almost 12 years ago | |||
| cfastie | "The optical diagram for the Spectronic 20 from here. It has two lenses. Below, the optical diagram for the Spectronic 20+ from the official manua..." | Read more » | almost 12 years ago | |||
| warren | "I see similar models for <$200 on ebay: http://www.ebay.com/sch/items/?nkw=spectronic+20&sacat=&ex_kw=&mPrRngCbx=1&udlo=&ud..." | Read more » | almost 12 years ago | |||
| straylight | "and how much does that thing cost Jeff ? " | Read more » | almost 12 years ago |