Public Lab Wiki documentation

Water conductivity monitoring

2 | 9 | | #14954

« Back to Water quality

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:


Ask a question  or help answer future questions on this topic


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 for more information.


Activities for people to test methods (these develop over time)

Add an activity  or request an activity guide you don't see listed

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.

Existing work

Title Author Updated Likes Comments
Using Coqui in a the Suquía river for conductivity measurements @alejobonifacio 3 months ago 9
Be careful calibrating Coqui conductivity sensor @alejobonifacio 3 months ago 3
Building a Coqui water conductivity sensor and analyzing its sound @bhamster 11 months ago 0
Coqui 文件 @imvec over 1 year ago 2
Building the new Coqui @natevw over 2 years ago 0
Pros/cons to cheap handheld water meters for pH, TDS, conductivity? @warren over 2 years ago 3
Water sampling workshop with a "Mega-Coqui" kit with One Cranston @warren over 2 years ago 1
Build a sound-generating Coqui conductivity sensor (new version!) @warren about 3 years ago 5
Could we just use the PWM feature of an Arduino to generate the 50% duty cycle we need for the Coqui or for a water conductivity meter? @roberts_ecofarm over 3 years ago 3
Inexpensive conductivity probe Step 1 - Sensor Probe design (revised) @roberts_ecofarm over 3 years ago 2
Inexpensive conductivity probe for drinking water monitoring network @roberts_ecofarm over 3 years ago 4
Voltage generation for conductivity sensor @roberts_ecofarm over 3 years ago 2
DIY conductivity Sensors @roberts_ecofarm over 3 years ago 6
DIY Science Lesson with the Coqui @pdhixenbaugh almost 4 years ago 25
What probes to get with data loggers? @pdhixenbaugh almost 4 years ago 4
Adding a jack to the Coqui @imvec about 4 years ago 1
Modified TDS sensor as Conductivity Sensor? @MadTinker over 4 years ago 9
Road Salt and Salmon @acjames76 over 4 years ago 0
Substitution for conductivity meter @Ag8n over 4 years ago 7
conductivity sensor electrolysis a concern in moving water? @MadTinker over 4 years ago 3
7 Ways to Measure, Monitor, and Evaluate Water Quality @anngneal over 3 years ago 2
In addition to testing for pH, what other water quality testing have you utilized, such as turbidity, conductivity, dissolved oxygen (DO), etc.? Can you share your experience with these? @gilbert over 4 years ago 0
Anyone with experience using 316L welding rods for conductivity sensor probes? @MadTinker almost 5 years ago 0
Show more