need some sensor for mesuring water detail

hi
i have a project that i must mesuring water detail.
i need to know :
1-density
2-PH
3-alkalinity
4-dissolved (carbon dioxide)
5-oxygen dissolved
6-calcium
7-magnesium
8-strontium
9-iron
10-iodine
11-phosphate
12-silicate
13-NH3
14-NO3
15-NO2

notice:
i live in iran so how i can buy those sensors??

pls help me.!

tnx

Prepare to spend several thousands of dollars on these kinds of sensors.
They can't be used like normal light or temperature sensors either, they often use proteins that bind to certain substances in order to measure them. You need to refill them, and you can't just leave them hanging in the water, you have to keep them in some kind of buffer fluid between readings, and they have to be calibrated regularly.

Pieter

If you Google each parameter you will find the technology used for each substance and you can gauge cost from that .
This is not really an Arduino type project - and as said expensive

ali-niri:
hi
i have a project that i must mesuring water detail.
i need to know :
1-density
2-PH
3-alkalinity
4-dissolved (carbon dioxide)
5-oxygen dissolved
6-calcium
7-magnesium
8-strontium
9-iron
10-iodine
11-phosphate
12-silicate
13-NH3
14-NO3
15-NO2

notice:
i live in iran so how i can buy those sensors??

pls help me.!

tnx

  1. Probably have to use an indirect measurement for this. If you mean salinity, then use conductivity
  2. Normal pH probe
  3. Keep dreaming. You can't measure that electrically.
  4. That's going to be expensive
  5. That's going to be expensive
  6. ISE Costs about a thousand dollars and will need to be replaced regularly
  7. Same as 6
  8. I doubt that probe exists
  9. I think there is an ISE for this, but you need to tell whether you want Fe2+ or Fe3+
  10. Another very very expensive ISE and it will only measure iodide. For iodine or iodate you need to do chemistry
  11. ISE exists but doesn't work very well and is expensive
  12. I haven't seen any probe for sililcate.
    13 - 15. Those probes exist but are very expensive and would need to be replaced fairly often.

If this is for a fish tank, look at the Seneye. It doesn't work very well from what I hear but it does cover a number of your required parameters.

For most of this you would be better off trying to build some sort of autotitrator and an automated spectrophotometer because these are much easier to get by chemistry than by electrochemistry.