# pH question:ph

## pH Sensors ## Questions [questions:ph] ## Activities [activities:ph] **** ## Updates [notes:ph] ...

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 » over 3 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 » over 3 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 » over 3 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 4 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 5 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 5 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 5 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 5 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 5 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 5 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 5 years ago
warren "Thanks, especially for the tips on oxidation! What can cause that, and how might it be avoided? " | Read more » almost 5 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 5 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 5 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 5 years ago
gilbert "One final example: (4) Citizen Science Water Quality Mapping - Kansas State University- A Natural Science & Environmental Monitoring Capstone ..." | Read more » over 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 years ago