| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Thanks! I'd guess that's true of some of #dfrobot / #knowflow sensors too, since several of theirs ship with buffer and are off-the-shelf probes co..." | Read more » | about 5 years ago | |||
| wln215 | "I've notices that if these pH meters are left sitting out, or if they get used frequently enough, they need calibration. These sets come with buffe..." | Read more » | about 5 years ago | |||
| warren | "For one, these sensors don't seem to log data, but they're so easy to use otherwise that they seem pretty good for a workshop, for example! cc @ch..." | Read more » | about 5 years ago | |||
| liz | "Hi @Ag8n , does "di water" mean distilled water? Also, i see @warren asked a sort of follow-up that seems to be about storing pH strips and keeping..." | Read more » | over 6 years ago | |||
| Ag8n | "PH paper can have interferences. Oxidizers like bleach can mess them up. It doesn't take much (ppm). This should be rare but can happen around, sa..." | Read more » | almost 7 years ago | |||
| stevie | "intersting, a couple options here: https://www.amazon.com/Newdy-Aquarium-Hydroponics-0-00-14-00-Measurement/dp/B07217NV2Q/ref=sr_1_11?ie=UTF8&..." | Read more » | almost 7 years ago | |||
| stevie | "Looking into some test strips as well. Here's a couple options: $11 - https://www.grainger.com/product/3UDD2?cm_mmc=PPC:+Google+PLA&s_kwcid=AL..." | Read more » | almost 7 years ago | |||
| Ag8n | "I was on Amazon and found a bunch of pH meters under $20. Supposedly good from 0-14 pH, but that is very unlikely. Still, for the cost, it would ..." | Read more » | almost 7 years ago | |||
| Bronwen | "Ooh, just spotted this paper about a DIY open source pH monitor. Let's reach out / look in to this! http://journals.plos.org/plosone/article?id=10..." | Read more » | almost 7 years ago | |||
| Bronwen | "I'm a little familiar with PH testing for aquariums (usually strips or vials) and soil for planting (vials or sensors). What's nice is that these t..." | Read more » | almost 7 years ago | |||
| Ag8n | "In this area (Ohio), at least, trace levels of hypochlorite ( bleach) work their way into the storm sewer. If you have a piece of red pH paper, b..." | Read more » | almost 7 years ago | |||
| warren | "Thanks, especially for the tips on oxidation! What can cause that, and how might it be avoided? " | Read more » | almost 7 years ago | |||
| Ag8n | "You want to check the expiration date of the strips, first. If they are expired, throw them out. And beware. If you are using something like red ..." | Read more » | almost 7 years ago | |||
| liz | "Here's the link to the article mentioned above: http://www.labmanager.com/lab-product/2010/10/evolution-of-the-ph-meter#.Wcl9xUqGP-k " | Read more » | over 7 years ago | |||
| liz | "I found this webpage that describes how to use either red cabbage, turmeric, radish, or elderberry to make a quick and short term color change test..." | Read more » | over 7 years ago | |||
| gilbert | "One final example: (4) Citizen Science Water Quality Mapping - Kansas State University- A Natural Science & Environmental Monitoring Capstone ..." | Read more » | over 7 years ago | |||
| gilbert | "(3) Puerto Rico Water Quality Monitoring Day (US EPA)-By Rachael Graham "On April 9, 2016 more than 1,200 volunteers participated in Puerto Rico W..." | Read more » | over 7 years ago | |||
| gilbert | "(2) US Rivers Get a Boost from Citizen Science Projects By: Haven Livingston Date: Monday, December 3, 2012 From December 2012 World Rivers Review:..." | Read more » | over 7 years ago | |||
| gilbert | "Three of many examples of citizen science initiatives that, inter alia, have tested for pH in water are as follows: (1) "Exploring Experimentation ..." | Read more » | over 7 years ago | |||
| gilbert | "A recent article appearing in Sciencing.com by Philip J. Carlson; Updated April 24, 2017, entitled "PH Meter Versus PH Paper," addresses the questi..." | Read more » | over 7 years ago | |||
| gilbert | "Arnaldus de Villa Nova around the year 1300 is credited with developing a litmus test for pH, (Chemical Education Digital Library), utilizing a blu..." | Read more » | over 7 years ago | |||
| MadTinker | "@gretchengehrke Thanks! That's kinda what I thought, but wasn't sure. I'll likely end up with both since the professional measurement suite has his..." | Read more » | over 7 years ago | |||
| gretchengehrke | "Hi @MadTinker, oxidation-reduction potential (ORP) and power of hydrogen (pH) measure different chemical properties: ORP provides information about..." | Read more » | over 7 years ago |