| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Holger | "If I got it right, your photometer is measuring amount of light traveling through a solution or suspension. The loss of signal could be due to abso..." | Read more » | over 6 years ago | |||
| Holger | "Hi there, my apologies, but I have not been here for a while. If you like, any of my projects published on instructables could be reposted as activ..." | Read more » | over 6 years ago |