YSI is a one of good brand, you can take multi probes for determine several parameters
Nitrate by YSI is probably not the best idea. check out GO i am putting the contact address, their instriuments are extremely reliable for online /in situ measurements.
GO Systemelektronik GmbH
Faluner Weg 1
24109 Kiel
Germany
phone +49-(0)431-58080-0
fax +49-(0)431-58080-11
email [email protected]
web www.go-sys.de
We have very good experience with TriOS ProPS hyperspectrale probe and the Tribox for longtime monitoring in surface water. It is not a small handheld analytic tool !
Thank you Martin, it is really nice equipment! Should it be installed directly in the water for a long period? it is about 5 kg!
Yuliya, in longterm monitoring stations we have had good experience with Nitratax probes by Hach Lange. They are quite heavy though and like all equipment that relies on chemical free direct photometric determination of nitrate results need to be checked against a standard method of nitrate determination, in order to make sure that there are no major interferences in the water bodies that you want to monitor.
As an alternative an Austrian manufacturer s-can offers similar equipment which looks much more sleek. Both manufacturers supply the water industry with online monitoring facilities in treatment plants.
Thank Joerg,
I will look at the price and possibility. Hach sounds good. Before I had Orion, but it is so expensive now. But my old was broken :(
Dear Yuliya; following link may be helpful for you
http://www.hindawi.com/journals/jamc/1993/160904/abs/
Thanks
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