Water conductivity monitoring

**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
alejobonifacio "Reading a little more I found that you could change the frequency of the PWM in arduino. I did not try to do this. " | Read more » 8 months ago
alejobonifacio "Hi! good question! The frequency of PWM of arduino is about 500hz. Is that enough for conductivity measurement? " | Read more » 8 months ago
JasmineKurb "Wow, This is amazing. Science is completely based on experiments. If you are staying science then you should know how to do experiments and you mus..." | Read more » 9 months ago
Ag8n "The conductivity cell should take the place of Rx. So disconnect the conductivity cell, disconnect Rx, leave the one of the conductivity cell conn..." | Read more » 10 months ago
alejobonifacio "Thanks @Ag8n for the explanation! I am learning a lot! :nerd_face: " | Read more » 10 months ago
alejobonifacio "Hi @Ag8n! What you suggest sounds interesting. Would it be something similar to the attached diagram? " | Read more » 10 months ago
Ag8n "Further note-EC is electrical conductivity " | Read more » 10 months ago
Ag8n "Especially in mixtures, not all soluble solids are conductive. So yes, you can dissolve (or sometimes suspend) something inert in water. We would..." | Read more » 10 months ago
warren "This is very cool! I do wonder if TDS is going to be consistently correlated with conductivity -- i may just not be well informed but isn't it poss..." | Read more » 10 months ago
Ag8n "Look up conductivity cell and wheatstone bridge Instead of feeding DC into the weatstone bridge, the audio signal is fed in. One leg of the wheats..." | Read more » 10 months ago
alejobonifacio "Thanks for your suggestion @Ag8n, sounds very interesting to try. Anyway I have to be honest and say that I don't quite figure out how to do what y..." | Read more » 10 months ago
Ag8n "It looks like the Coqui is a pretty well designed instrument. But, some of the pharmaceutical instruments would send the tone through a bridge. T..." | Read more » 10 months ago
alejobonifacio "Hi @warren! Yes, 0.1-1 g/L is a useful range at least in rivers in this part of the world, in fact for this river test it worked well. I still have..." | Read more » 10 months ago
liz "Thank you for this close and careful work <3 " | Read more » 10 months ago
warren "Hi @alejobonifacio i wonder if there is an 'ideal' range if we can use resistors or capacitor sizes to shift that to our looked-for "search range" ..." | Read more » 10 months ago
liamann67 "  Expert tips for writing bsb42015 answers easily When it comes to writing different assignments in leadership and management. Download the s..." | Read more » 10 months ago
EdMallon "The ones from Fisher Scientific and Thermo have notably better quality seals than no-name brand tubes. So if you are putting them somewhere swampy ..." | Read more » 11 months ago
bhamster "Thanks for this update, @EdMallon! I read the full post you linked and laughed at "Pro-Minillennium Falcons." :smiley: The Falcon tube housing is n..." | Read more » 11 months ago
EdMallon "This latest update was motivated by several factors but the most important ones were: (1) Our own project has grown to the point that every fieldwo..." | Read more » 11 months ago
liz "What a fantastic update! It's great to hear from you @EdMallon. An underwater logger running for a year on a single coin cell battery?? COOL. Taggi..." | Read more » 11 months ago
EdMallon " It’s been a long time since I posted, and you’d be forgiven for thinking the Cave Pearl Project was yet another victim of COVID. While the attend..." | Read more » 11 months ago
sirazul71 "Nice writing. Thanks Life Store is one of the best and most popular online stores. You will find everything you need in the life store. Visit in ou..." | Read more » over 1 year ago
waniakzmi "You are doing well for well-being looking forward to it we are working to provide the best ease by providing medical equipment and products online ..." | Read more » over 1 year ago
liz "Fantastic! Just adding some screenshots of your videos so people can get excited: " | Read more » almost 2 years ago