Hi! I'm in touch with a group thinking about deploying Babylegs in a stream from a bridge or a tr...
Public Lab is an open community which collaboratively develops accessible, open source, Do-It-Yourself technologies for investigating local environmental health and justice issues.
All topics »
If you cannot use the ReCaptcha to verify you are not a bot, use this alternative verification.
As an open source community, we believe in open licensing of content so that other members of the community can leverage your work legally -- with attribution, of course. By joining the Public Lab site, you agree to release the content you post here under a Creative Commons Attribution Sharealike license, and the hardware designs you post under the CERN Open Hardware License 1.1 (full text). This has the added benefit that others must share their improvements in turn with you.
sign up to join the Public Lab community
Forgot your password? Reset it here
by stevie |
April 28, 2020 17:03 |
Hi! I'm in touch with a group thinking about deploying Babylegs in a stream from a bridge or a tree. How long should it be out there collecting a sample? What are factors we should consider in deciding this length of time?
We usually deploy for half an hour. Anything less than that and its not much of a representative sample. That's in relatively steady flowing water without surface smutz like leaves, algae or debris. You should generally avoid water with a lot of gunk in it because it makes processing the sample nearly impossible. We've also left trawls out for much longer-- 10 hours at one point, but that was in slow, even water where we knew the trawl wouldn't tangle or be investigated by ducks or people. I recommend always keeping an eye on the trawl in case it gets tangled.
Hope that helps.
Reply to this comment...
Log in to comment
mapknitter export stuck
updated 2 days ago
Can we add a 2um filter to the bucket monitor to capture particulates?
updated 6 days ago
Which NO2 Sensor for low-concentration measurement?
updated 8 days ago
Is anyone working on the reception of satellite imagery using ham radio methods?
updated 11 days ago
Can I use a clear case with the Infragram pi camera?
updated 18 days ago
Is the Purple Air sensor an EPA-validated tool?
updated 18 days ago
where is layer button in mapknitter?
updated 19 days ago
Have you used the bucket air sampler or other grab sample tool?
updated 20 days ago
This is part of: