**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 | ||
|---|---|---|---|---|---|
| Bronwen | "Hi! The simplest (and cheapest) conductivity sensor I can think of is the Coqui-- we have a recent blog post about it here, and I would imagine wit..." | Read more » | about 6 years ago | |||
| warren | "Welcome! Very cool! " | Read more » | about 6 years ago | |||
| roberts_ecofarm | "Thanks Chris, We have multiple injection well sites in our county, and more in the works, so we are planning on covering a large area. We will be..." | Read more » | about 6 years ago | |||
| cfastie | "You are right that there has not been much follow-through at Public Lab on developing and testing DIY conductivity or total dissolved solids (TDS) ..." | Read more » | about 6 years ago | |||
| EdMallon | "Posted a new Tutorial: Adding the SSD1306 OLED Screen to an Arduino Logger (without a library) This is the third in our series about using shift-o..." | Read more » | about 6 years ago | |||
| liz | "Hi @zengirl2 , you are awesome for re-working the wiring diagram! i just followed your updated instructions in preparation for doing this activity ..." | Read more » | about 6 years ago | |||
| EdMallon | "That's very tempting, but I'm not sure I can add another thing to the plate this year. I still have several important new features to add to the co..." | Read more » | about 6 years ago | |||
| zengirl2 | "This is a great write-up on this activity. As @warren mentioned I did this activity at MakerFaire with a very broad age range 6-60. Because I was b..." | Read more » | about 6 years ago | |||
| warren | "Love this! Super :smiley: Our breadboards didn't have nice Vcc or Ground sections like those pictured in the activity, so we decided to use one ro..." | Read more » | about 6 years ago | |||
| Bronwen | "Hi @EdMallon -- this is so great! I was just scrolling through all of the updates on here, and was wondering if you had any interest in turning thi..." | Read more » | about 6 years ago | |||
| EdMallon | "This is a follow-up to our post about using Nokia 5110 screens on three unused analog lines with shift-out. That saved me from messing with the h..." | Read more » | about 6 years ago | |||
| EdMallon | "While the logger core is generic, surface deployments tend to use the 4" housing (which is easy to build) while the underwater deployments (~ half ..." | Read more » | over 6 years ago | |||
| pdhixenbaugh | "Chris, thanks so much for your input. That information about memory usage is invaluable. I will plan on the non-wireless route for now. Maybe with ..." | Read more » | over 6 years ago | |||
| warren | "Oh and also this one! https://publiclab.org/notes/warren/12-06-2017/help-document-how-to-connect-different-sensors-to-a-data-logger " | Read more » | over 6 years ago | |||
| warren | "This attempt to get people compiling a list might be helpful... esp if we can figure out a place to feature this -- https://publiclab.org/notes/wa..." | Read more » | over 6 years ago | |||
| cfastie | "I was impressed by the price ($12.90) of the DFRobot TDS sensor that MadTinker is working with so I bought a couple. It was easy to get it to work ..." | Read more » | over 6 years ago | |||
| warren | "Love this! :grinning: " | Read more » | over 6 years ago | |||
| EdMallon | "A visiting researcher dropped by our humble basement workshop with questions about the physical skill level students would need if they added one o..." | Read more » | over 6 years ago | |||
| xose | "A bit late but here is how to plug the jack https://publiclab.org/notes/imvec/06-08-2018/adding-a-jack-to-the-coqui " | Read more » | over 6 years ago | |||
| xose | "Deffinitely! On wednesday i'll post the mod ;) " | Read more » | over 6 years ago | |||
| warren | "This is really cool. A recording would mean you could calibrate it later, too -- if you maybe dipped it in 2 different high and low solutions of kn..." | Read more » | over 6 years ago | |||
| warren | "Oooooohhhhhhhh!!!!! " | Read more » | over 6 years ago | |||
| xose | "Added a 3.5mm jack to record the wave ;D " | Read more » | over 6 years ago | |||
| EdMallon | "I had a project that needed some live data display, and looking for the cheapest low-power solution for our loggers lead me to the Nokia 5110 LCD. ..." | Read more » | over 6 years ago |