Public Lab Research note

DIY water monitoring workshop at HKBU

by shanlter |

I gave a 3 hour workshop on DIY water monitoring at HKBU yesterday. and want to share my schedule and slides here.

Ideally it should be 2 X 3hour workshop, or 2 X 3hour indoor workshop plus half day fieldwork. I just don't have more time yesterday...

This is a project based learning workshop that contains 3 parts: Problem, Learn, Create. the slides I am using is here:


I prepared 5 problems as examples that need to be further investigate or solve. it's here. If have more time, actually can take participants out for 0.5-1 day fieldwork, to better understand local problem


there are 2 session:

1. Learn water quality assessment with quick test kits.

I introduce this part with a water guessing game. All participants were asked to bring water sample, and I also prepare some samples. I put the sample into different bottles, to let them guess which is what by testing the water.

I prepared these test kits: TSD, Chlorine, Hardness, NH4, PO4, CODmn, pH, heavy mental... most of the kits can be purchased from the following websites:

pH strips, hardness strips,

Sealed reagents for ammonia, COD, phosphate, etc

Chlorine test kits like余氯测试剂:b0075cf3109ed5fe3340378b628f08bf&ali_trackid=1_b0075cf3109ed5fe3340378b628f08bf&spm=a230r.1.14.1

2. Learn Arduino basic with arduino uno, and write a simple code to read and store TDS value into a microSD Card

sample code is here but I encourage the participant to write by themselve

the procedure is mostly like this:

  • turn on LED
  • connect TDS sensor
  • Make interactions between TDS and LED (e.g tds over 150ppm led will blink)
  • store data into SD card
  • connect real time clock
  • put everything together.

the sensors, board, and modules are here


I don't have time for this part, but ideally participant will group on to discuss/design their system, and prototype it, with the provided materials

I did this 

People who did this (0)

None yet. Be the first to post one!

This is marked this as an activity for others to try.
Try it now   Click here to add some more details.

workshop water-quality knowflow



You must be logged in to comment.