Attributing research is important, which is why we have a "Contributors" section on all tool and place pages. But you're only added to the list of contributors if you publish a research note tagged with that tool or place! This is to get people not only to do civic science, but to share it with others.
To encourage people to contribute formally, this is a quick email you can send them to invite them (friendly-like) to post on the website:
Hey XXX - I also want to make sure you get credited for your contributions. For now the best way is if you post a research note on the PublicLaboratory.org website and tag it with "spectrometer". Then your name will show up on the right sidebar under "contributors" on the tool page:
http://publiclaboratory.org/tool/spectrometer
If you prefer not to be listed, it's of course optional. I always hope people will add their name to the list of contributors though.
Best,
Jeff