| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| 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 | |||
| Markos | "Hi, There are two types of current that can be generated when two conductive materials are dipped into the water. 1- Faradaic current 2- Non Farad..." | Read more » | almost 7 years ago | |||
| MadTinker | "Yeah, that seems right. I should have thought thru it a bit more. " | Read more » | almost 7 years ago | |||
| cfastie | "I know nothing about this topic, but here is the model I concocted from whole cloth to understand it. Measuring conductivity of water with electro..." | Read more » | almost 7 years ago | |||
| warren | "Via our friends at NASA AREN: spruce sticks -- https://www.aircraftspruce.com/categories/building_materials/bm/menus/wp/spruce.html 1/8" foam cor..." | Read more » | almost 7 years ago | |||
| warren | "Oh, interesting! Maybe @programmer1200 would be interested in this, re: related work on a turbidity sensor... " | Read more » | almost 7 years ago | |||
| Ag8n | "The current epa method for turbidity, with standard prep, is at: Https://epa.gov/sites/production/files//2015-08/documents/method_180-1_1993.pdf ..." | Read more » | almost 7 years ago | |||
| martin-slavik | "Limit of detection is dependent on instrument and method used. Desktop spectrometer works only with visible light, so for detection of substance yo..." | Read more » | almost 7 years ago | |||
| Bronwen | "You can also take a look at our checklist (a starting place for anyone interested in participating in the Community Kits initiative) here! " | Read more » | almost 7 years ago | |||
| warren | "@eustatic -- @shannon mentioned Gulf Monitoring Consortium has a ton of work on this -- do you have some links you could share if you have a moment..." | Read more » | almost 7 years ago | |||
| warren | "Oh, cool -- this page (https://www.epa.gov/enviro/envirofacts-data-service-api) shows this type of query, starting with a zip code prefix: https:/..." | Read more » | almost 7 years ago | |||
| warren | "Oh, and maybe Skytruth Alerts is a good place to go? But I'm not sure it does historical data: http://alerts.skytruth.org/ They do have an API: h..." | Read more » | almost 7 years ago | |||
| warren | "GitHub lists 7 projects: https://github.com/search?utf8=%E2%9C%93&q=toxics+release+inventory&type= But the EPA site seems only to offer JS..." | Read more » | almost 7 years ago | |||
| liz | "Here's a permalink to the PDF on our site: ee-soilsampling-sop-env-3-13.pdf " | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here's a great resource for soil sampling. Section 8.3.2 gives a good start for a step-by-step protocol for surface soil sampling. Table 8.2 is sup..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Table 8.2 in that doc is particularly useful. " | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here is a great reference document that helps parse out some different types of sampling for different study designs, depths of samples, etc. We co..." | Read more » | almost 7 years ago | |||
| phillipwallace | "this is very helpful article. will share it to others. pls share too. http://fifamobilehack.today/ " | Read more » | almost 7 years ago |