**Conductivity** is a measure of a solution's ability to conduct electricity, as measured in Siemens per meter (S/m). (lead image by @ddileona) This page is under development, please add background info: * Info about regulations * Info about ecological or human health impacts * Advocacy leverage points * Constraints we're working within: cost, complexity, sensitivity, time Also see resources on this page: https://publiclab.org/wiki/conductivity_sensing ## Questions [questions:conductivity] **** ## Sensors Here's a list of different conductivity sensors and measurement systems. Also see below for some Do-It-Yourself approaches to measuring conductivity, and [this page](https://publiclab.org/wiki/conductivity_sensing) for more information. * [the Coqui](/wiki/coqui) **** ## Activities Activities for people to test methods (these develop over time) [activities:conductivity] **** ## Existing work [notes:conductivity] ...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, Ed - thanks so much, I always love your updates. We'd love to feature your work more prominently -- would you be interested in posting this upd..." | Read more » | almost 7 years ago | |||
| EdMallon | "While breadboard loggers are quick, the connections tend to be a bit too fragile for serious testing. So I've come up with a configuration based on..." | Read more » | almost 7 years ago | |||
| bhickman | "Hi Patrick. I'm currently out in the field as part of a research team and won't be back to my lab for a few weeks. Once I get back I can look at so..." | Read more » | about 7 years ago | |||
| EdMallon | "I know the RIFFLE project has been doing this for a while now, but I saved SD power control to the end of my quest for low power logging, because I..." | Read more » | about 7 years ago | |||
| pdhixenbaugh | "Hi Ben, checking in here -- have you used this design any further? A few folks would be very interested to see what kinds of accuracy and precision..." | Read more » | about 7 years ago | |||
| pdhixenbaugh | "Thanks @rfdave! This is a great start! I am going to inquire about what kind of accuracy @bhickman got with his as the next step. @liz roping you ..." | Read more » | about 7 years ago | |||
| rfdave | "Hi @pdhixenbaugh I finally got some time to look at both schematics. The Analog Devices one is ~ 3x as many parts adn @bhickman design, although bo..." | Read more » | about 7 years ago | |||
| pdhixenbaugh | "Hello @rfdave ! I would be interested in getting this rolling! Thank you so much for providing that link to the design! I think there are many folk..." | Read more » | about 7 years ago | |||
| rfdave | "@pdhixenbaugh have you had a chance to make much progess on this? Here is a link to a circuit design from Analog Devices that claims to have prett..." | Read more » | about 7 years ago | |||
| EdMallon | "I've developed a method to calibrate thermistors of unknown specification to something near +/- 0.1 C https://edwardmallon.wordpress.com/2017/04/2..." | Read more » | about 7 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 7 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 7 years ago | |||
| EdMallon | "I'm currently working out how to calibrate these oversampled thermistors to a reasonable level without breaking the bank for a high quality referen..." | Read more » | over 7 years ago | |||
| warren | "Wow, Ed, this is really cool, and obviously applicable to many sensor projects using Arduinos. Just curious if you'd be interested in posting a mor..." | Read more » | over 7 years ago | |||
| EdMallon | "After much experimentation, I finally came up with a simple dithering method that allows you to easily use oversampling to add 4-5 extra bits of re..." | Read more » | over 7 years ago | |||
| EdMallon | "We just fired up a new collaborative project, and some of the academics from the other university suggested that our blog was something of a spaghe..." | Read more » | over 7 years ago | |||
| warren | "I've submitted a bug report with steps to fix: https://github.com/publiclab/plots2/issues/885 -- sorry! " | Read more » | over 7 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 » | over 7 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 » | over 7 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 » | over 7 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 » | over 7 years ago | |||
| donblair | "Hallo! I haven't had great luck with Digikey shopping carts sticking around, so it might be better to put direct links to parts in e.g. a wiki ......" | Read more » | over 7 years ago | |||
| kanarinka | "I'm actually not sure about this - @donblair - do you know the answer? " | Read more » | over 7 years ago | |||
| warren | "I renamed this and converted it to a "Question" in the new Q&A system " | Read more » | over 7 years ago |