nitrate probe, ph probe, etc for arduino ?

[nmo0ory]

hello,
i was wondring where can i find some probe that work with arduino ?
for
nitrate
phosphate
ph
and so on ?

 

[GoVols]

First off:
Welcome to Reef 2 Reef!!

I don't know of any probes that test for phosphates or nitrates and to me... ph probes have standard connections from brand to brand.

If I'm wrong ;Eggonface then "others", please reply

 

[wykat]

I've been searching for Nitrate sensors and came so far:

Probe
https://www.aliexpress.com/store/pr...86f4177&transAbTest=ae803_2&priceBeautifyAB=0
Related technical documentation:
http://www.spectrasens.com/Waterkwaliteit/UIT_DIVER_DB_NO3_Nitrate_V4.pdf
There are some other probes offered but starting >200USD
I'm not sure but reading the documentation it looks like you can't do continoues monitoring (dry storage)

Colored/RGB
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4526554/
http://www.appropedia.org/Open-Source_Photometric_System_for_Enzymatic_Nitrate_Quantification
Disadvantage is that reagents are required, so it can't be used in the aquarium and not continoues

Sensor (study but interesting)
https://mro.massey.ac.nz/bitstream/handle/10179/8302/02_whole.pdf?sequence=2&isAllowed=y
Would be interesting for somebody with more electrical design knowledge. It looks not very precise but also provides proposals for improvement. The positive of this article is that it can do continoues monitoring

Then on thingiverse there are some approaches:
https://www.thingiverse.com/thing:435678
https://www.thingiverse.com/thing:2890799

I've tried to use "Link" but it just came out as shown.