| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "I see a couple leads here, one by @jschaffr : https://publiclab.org/notes/jschaffr/11-21-2011/controlled-testing-bw-film-hydrogen-sulfide-detecto..." | Read more » | almost 7 years ago | |||
| warren | "Hi, gretchen - the photos are great. Do you have a list of Amazon links and prices you could add -- as a step in getting a prototyping kit together..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here are before and after photos. We did not expect (and did not observe) any discoloration since we were only putting them out for less than 24 ho..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here is a picture after sanding one of the little copper strips. The green pad is actually soft sandpaper / polishing paper. " | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here is a picture of cutting the copper sheet into strips. " | Read more » | almost 7 years ago | |||
| gretchengehrke | "Hi @warren, Thanks for the reminder to add pictures. I have tried inserting photos a few times today, but it keeps crashing the edit (and, seemingl..." | Read more » | almost 7 years ago | |||
| warren | "And if there are any photos of these steps, i'd love to help make diagrams to illustrate the process! " | Read more » | almost 7 years ago | |||
| warren | "Hi! Do you have photos you can attach for what the copper should look like before/after H2S exposure? Or after any possible false positives? " | Read more » | almost 7 years ago | |||
| zengirl2 | "@gretchengehrke OK, ty for the response. Sounds like I need to check manufacturers about the copper tape to see how pure it is. Also, I was thinkin..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Hi @Zengirl2, I'm not sure about the copper strips. Whatever copper is used needs to be fairly pure, and I'm not sure if the copper tape is pure c..." | Read more » | about 7 years ago | |||
| zengirl2 | "@gretchengehrke Do you know if copper tape can be used? I'm considering giving testers out at the Factory Farm Summit mounted on cardboard. Also, s..." | Read more » | about 7 years ago | |||
| zengirl2 | "I was really excited to work on this at BarnRaising. As a group we constructed sensors by using tin snips to cut sheets of copper, which is a bit t..." | Read more » | about 7 years ago | |||
| sara | "We have marked the L type copper pipes with black tape. " | Read more » | over 12 years ago |