| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| 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 » | about 7 years ago | |||
| mathew | "I'm also interested if the same lenses and filters could be applied to a Lepton sensor-- It's primary sensitivity is in the far infrared. It appea..." | Read more » | over 7 years ago | |||
| mathew | "I discovered the OpenMV project has a thermopile board. I can't find a lot of documentation on it, but I found this: https://openmv.io/docs/librar..." | Read more » | over 7 years ago | |||
| loganw | "Here's an update, I've received a sensor (uncalibrated, which turns out to be an issue) and read data off of it: http://exclav.es/2016/10/26/talkin..." | Read more » | over 7 years ago | |||
| mathew | "we don't have to frame the capabilities as a large leaks vs. small leaks question, I think it will be more about lighting conditions. The commerc..." | Read more » | over 7 years ago | |||
| loganw | "Cool! I was thinking about attaching a peltier cooler to it. I can't find much info on what that does to a thermopile sensor though, since they bas..." | Read more » | over 7 years ago | |||
| mathew | "I found this handy thermoelectric cooler module calculator: http://tetech.com/peltier-thermoelectric-cooler-module-calculator/ " | Read more » | over 7 years ago | |||
| mathew | "great to see these initial assumptions! and awesome work on finding both a low-cost sensor and a low-cost filter. The FLIR Lepton thermal images a..." | Read more » | over 7 years ago | |||
| eustatic | "I support the use of the term Sniffle! Lauren Sullivan would probably agree! the battery clip will also be tres useful " | Read more » | almost 8 years ago | |||
| Bob | "After 3D printing the battery clip, you may need to press the battery arms together while snapping it onto the Riffle board. I uploaded the battery..." | Read more » | almost 8 years ago | |||
| cfastie | "Nice battery clip. I covered the back of my Riffle with adhesive Velcro hooks and wrapped some adhesive Velcro loops around the battery. But I migh..." | Read more » | almost 8 years ago | |||
| kensanfran | "Hello, Sorry just noticed this post. I've been collecting my links and references on this DIY gas sensor calibration page of my wiki. I'm also tin..." | Read more » | about 8 years ago | |||
| kkoerner | "LukeS good to know, thanks for testing out those pumps and posting your results! " | Read more » | about 8 years ago | |||
| mathew | "Great writeup, Luke! cool work. " | Read more » | about 8 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 » | about 8 years ago | |||
| pral2a | "Hi @kensanfran On the threat below you mentioned: "So another part of my exercise has been building up various DIY calibration rigs using pre-mix..." | Read more » | about 8 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 » | over 8 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 » | over 8 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 » | almost 9 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 » | almost 9 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 » | almost 9 years ago | |||
| mathew | "Our portland office has .026ppm (26ppb) of formaldehyde when measured over by our packing and shipping area. That's over 3 times the chronic dange..." | Read more » | almost 9 years ago | |||
| danbeavers | "Another observation: It would be good to have a check list for the measurement. For example: Verify that the humidity is above ?? and below ??..." | Read more » | almost 9 years ago | |||
| danbeavers | "@Mathew The following is from a mechanical engineer friend of mine: Assuming you could pull a reasonably good vacuum on the orifice, you could ge..." | Read more » | almost 9 years ago |