Public Lab Wiki documentation

Water conductivity monitoring

739 views | Last edited by warren over 1 year ago | #14954

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
Building the new Coqui @natevw 7 days ago 0
Water sampling workshop with a "Mega-Coqui" kit with One Cranston @warren 12 days ago 3
Pros/cons to cheap handheld water meters for pH, TDS, conductivity? @warren 15 days ago 3
Build a sound-generating Coqui conductivity sensor (new version!) @warren 5 months ago 6
7 Ways to Measure, Monitor, and Evaluate Water Quality @anngneal 7 months ago 2
Build a Coquí: A Simple Water Conductivity Sensor (version 1) @akshaya 7 months ago 22
An Arduino Based UnderWater Sensor Platform @EdMallon 8 months ago 60
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 11 months ago 1
Inexpensive conductivity probe Step 1 - Sensor Probe design (revised) @roberts_ecofarm 12 months ago 2
Inexpensive conductivity probe for drinking water monitoring network @roberts_ecofarm 12 months ago 4
Voltage generation for conductivity sensor @roberts_ecofarm 12 months ago 2
DIY conductivity Sensors @roberts_ecofarm 12 months ago 6
DIY Science Lesson with the Coqui @pdhixenbaugh about 1 year ago 28
What probes to get with data loggers? @pdhixenbaugh over 1 year ago 4
Adding a jack to the Coqui @imvec over 1 year ago 2
Modified TDS sensor as Conductivity Sensor? @MadTinker over 1 year ago 9
Road Salt and Salmon @acjames76 over 1 year ago 0
Substitution for conductivity meter @Ag8n over 1 year ago 7
conductivity sensor electrolysis a concern in moving water? @MadTinker over 1 year ago 3
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 almost 2 years ago 0
Anyone with experience using 316L welding rods for conductivity sensor probes? @MadTinker about 2 years ago 0
AstroPlant RPi sensory system @Sidney_AstroPlant over 2 years ago 10
Riffle Device: Water Conductivity Sensor @rebeccah about 3 years ago 7
Mapping Lead-Free Water @smmontgom about 3 years ago 0
Planning for a new Riffle conductivity circuit @pdhixenbaugh about 3 years ago 5
Conductivity and Temperature Meter @bhickman over 3 years ago 10
Conductivity Sensing: Open Questions @donblair almost 4 years ago 7
Thermal Fishing Bob Development Workshop on Northeastern's Campus @kgrevera over 4 years ago 2
Thermal Fishing Bob Development Workshop @kgrevera over 4 years ago 1
Mehak, Virginia, & Tori Conductivity Research Summary @mehaky over 4 years ago 0
Reflection Salty Scandal @vvincent over 4 years ago 0
Connor, Matt, and Jess' conductivity research summary @mattmullen over 4 years ago 0
Reflection on Sensor Journalism @Jenn_Zarate about 5 years ago 0
A Reflection on Sensor Journalism @madelinebilis about 5 years ago 0
Conductivity Results from 3 Water Samples @madelinebilis about 5 years ago 0
Coqui BBv1.0: Testing conductivity of a solution @donblair about 5 years ago 1
Follow up — Group 2 Water Sample Results @jacktemp about 5 years ago 0
Follow up on Bridget and Casey's water samples @caseyrcampbell327 about 5 years ago 1
Collect 3 Water Samples for Testing @amarini about 5 years ago 2
Duty Cycles & 555s --> linearity! @donblair about 5 years ago 16
Coqui draft board design on Upverter @warren about 5 years ago 8
How much are Coqui measurements affected by hot/cold water? @warren about 5 years ago 16
Accessible procedure for calibrating conductivity measurements? @donblair about 5 years ago 3
Recap: Open Water Workshop, 7/12/14 @donblair over 5 years ago 8
Simple 555 conductivity meter @donblair over 5 years ago 7
Using an Audio Jack to Assess Conductivity @donblair over 5 years ago 2
Riffle dev: 'Fun w/ Five-Five-Fives' @donblair over 5 years ago 12
RIFFLE: Confronting Confusing Corrosion Condundrums @donblair over 5 years ago 8
Conductivity meter @JSummers almost 6 years ago 2
Video on geocoded conductivity readings from strip mine watersheds @warren over 8 years ago 0
Show more

Public Lab is open for anyone and will always be free. By signing up you'll join a diverse group of community researchers and tap into a lot of grassroots expertise.

Sign up