(Copying this from the blog to the forum in hopes of getting a response for Francois. Heather Brooks, Webmaster)
On Dec. 2, 2015, Francois (http://envirodiy.org/members/francois/) wrote:
Hi, nice to join the forum..
We manage an experimental project for irrigation with reclaimed water.
For this purpose it is very important to monitor continously the quality variation of the water.
Reference packaged sensors for water quality control are very high cost. What alternative solutions does the community suggest for turbidity, nitrate, oxygen or ph?
Thanks in advance !