This is a testing site only. See the live Public Lab site here »


555
555


Author Comment Last activity Moderation
Nireeksha "@Nireeksha awards a barnstar to donblair for their awesome contribution! " | Read more » almost 4 years ago
Nireeksha "@Nireeksha awards a barnstar to donblair for their awesome contribution! " | Read more » almost 4 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 » over 4 years ago
Ag8n "I have never met a conductivity meter that doesn't have some amount of drift. Having said that, the commercial conductivity meter at work was a lo..." | Read more » over 4 years ago
MadTinker "Yeah, that seems right. I should have thought thru it a bit more. " | Read more » over 4 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 » over 4 years ago
NCartmell "I've built one of your fine Coqui circuits. It works very well with the LDR (photo resistor). Is there a recommended distance between the metal pro..." | Read more » over 5 years ago
NCartmell "I can help with probe material: Regarding Stainless Steel, general purpose grade is 304 and marine grade is 316. Stainless steel, particularly 304 ..." | Read more » over 5 years ago
warren "I've submitted a bug report with steps to fix: https://github.com/publiclab/plots2/issues/885 -- sorry! " | Read more » almost 6 years ago
warren "I'm actually having trouble editing this page -- must be a bug due to it being "converted" to a question instead of being one from the start. " | Read more » almost 6 years ago
warren "Actually i haven't tried marking a question as an activity; i guess it works? Maybe not a good practice? I dunno -- new territory for us! As to you..." | Read more » almost 6 years ago
pdhixenbaugh "Also: I'm not sure if you're testing (1) Hot Tap Water vs Cold Tap Water, or (2) Hot Tap Water vs. Hot Tap Water which has cooled down. Put another..." | Read more » almost 6 years ago
pdhixenbaugh "So both questions and research notes can be marked as an activity? And at some point, folks replicating the activity can post their answers? I like..." | Read more » almost 6 years ago
warren "I renamed this and converted it to a "Question" in the new Q&A system " | Read more » about 6 years ago
mathew "I wish I had brands to list, but yes, we've seen commercial probes using small (0-80) screws as their probes. " | Read more » over 6 years ago
pdhixenbaugh "What will be the long term corrosive effects of current and salt water on our stainless steel screws? I think we've seen stainless steel probes on ..." | Read more » over 6 years ago
warren "large yogurt container Love this idea for standardization; used yogurt containers pile up quickly in my house. Or a mason jar! I'd guess material ..." | Read more » over 6 years ago
donblair "Hah, just saw that @mathew posted a link I was reading this morning, but forgot to include: http://www.electroschematics.com/6923/555-low-voltage-..." | Read more » over 6 years ago
GreenChemist "Hi Warren, Thanks. I am a chemical engineer who always worked in Medical and Safety industries. Currently I am looking for a new position anywhere ..." | Read more » about 7 years ago
warren "It's a good point -- esp. always to be sure that the scope of the test is clear. The idea here was more exploratory, but in general this kind of co..." | Read more » about 7 years ago
GreenChemist "Hi Warren, Indeed the test would not find the bacteria, you need a polymerase chain reaction (a PCR test), or grow a culture. I am not sure if this..." | Read more » about 7 years ago
warren "Hi, Don - sorry, you never wrote back so I hadn't changed the title until now - it now says "Coqui" only - thanks. The conclusion you draw: it s..." | Read more » about 7 years ago
GreenChemist "Hi Warren, I am new at this, so maybe I missing the ball, but isn't one of the reason why not to drink from the hot tap the possible presence of L..." | Read more » about 7 years ago
warren " PCB on the right, of course. " | Read more » over 7 years ago