| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| xose | "Just found this (GoPro only) for 90$ → http://www.eyeofmineactioncameras.com/Underwater_WiFi_View_by_Eye_Of_Mine_Action_Cameras_p/euwfv.htm " | Read more » | almost 7 years ago | |||
| warren | "I love this idea. Here are some leads on connecting a TDS meter to an Arduino, if that's what you're interested in: https://forum.arduino.cc/index..." | Read more » | almost 7 years ago | |||
| warren | "wow!!! This is very cool. Here's an amazon link: https://www.amazon.com/s/?tag=duc0c-20&url=search-alias%3Daps&field-keywords=tds%20aquarium " | Read more » | almost 7 years ago | |||
| Ag8n | "I checked Amazon. There are several tds meters that also do conductivity for a price of under $20. Since a scientific model lists for about $1000,..." | Read more » | almost 7 years ago | |||
| Ag8n | "Sorry. Truncated the internet address: Https://www.hydroponics.net/learn/debate_over_ec_and_tds.php " | Read more » | almost 7 years ago | |||
| Ag8n | "Check out: Https://www.hydroponics.net/lear All tds meters are conductivity meters, but according to the article, they may not all use the same c..." | Read more » | almost 7 years ago | |||
| Ag8n | "I think it is. Was hoping someone was more familiar than me. Different websites talk about charge and others about conductivity, which can be two..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Hi @Ag8n, Do you know how the aquarium TDS meter works? Maybe it really is just a super cheap conductivity meter? " | Read more » | almost 7 years ago | |||
| fez | "That's great...thank you Warren. It's good to see something is moving in this direction too! So far DIY sensing is mostly relegated to air quality ..." | Read more » | almost 7 years ago | |||
| 31gane | "definetely, they are more precisely grated than the CD/DVD grooves (for storage). moreover, with different type of grating, selection has to be man..." | Read more » | almost 7 years ago | |||
| warren | "We're starting to compile a lot of different sensors and testing methods here -- could be of help! https://publiclab.org/wiki/water-sensors " | Read more » | about 7 years ago | |||
| oglezsa | "Will do. Thank You. " | Read more » | about 7 years ago | |||
| warren | "Yes, you should be able to -- the angles may change though! Tell us what happens when you do! " | Read more » | about 7 years ago | |||
| Georgina | "Thanks for this guidance! " | Read more » | about 7 years ago | |||
| stevie | "Hi there, great question. Bringing an answer over from @thegreencommunitygarden that was sent out on the main list: "Try the local cooperative exte..." | Read more » | about 7 years ago | |||
| mathew | "I've been in touch with Airmetrics over the issue. they're been very helpful and responsive. (see below) " | Read more » | almost 8 years ago | |||
| mathew | "Airmetrics got to scratching their heads over this difference as well! It turns out there is an additional variable that isn't listed in the manua..." | Read more » | almost 8 years ago | |||
| warren | "Do we have contacts who've used these instruments that we could reach out to for input on these calculations? " | Read more » | almost 8 years ago | |||
| mathew | "I contacted some folks at Airmetrics, and their initial reaction was that I appeared to be doing it correctly (but they didn't really dig in). The ..." | Read more » | almost 8 years ago | |||
| mathew | "@gretchengehrke 1) yes, P and T are pressure and temp. There's Pstd and Pact (P standard and P actual) same for temperature. Those are the tempera..." | Read more » | almost 8 years ago | |||
| gretchengehrke | "Hi Mathew, There are three things that come to my mind: (1) To think more through Equation 1, I'm curious what P and T are. Pressure and Temp? (2) ..." | Read more » | almost 8 years ago | |||
| warren | "Yes! I believe it's documented pretty deep in Ananyo's post: https://publiclab.org/notes/ananyo2012/08-20-2016/gsoc-2016-final-work-product-of-expa..." | Read more » | about 8 years ago | |||
| pdhixenbaugh | "You can change any research note into a question post by adding the tag question:subject, replacing "subject" with the tag the question relates to...." | Read more » | about 8 years ago | |||
| pdhixenbaugh | "I can't seem to answer my own question even after following the tags "question" and "question:question". EDIT: the top of the page still reads "sub..." | Read more » | about 8 years ago |