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Nachricht: <blockquote data-quote="ganesh" data-source="post: 385895" data-attributes="member: 2215">Eine ähnliche Frage hatte ich dem Hersteller auch mal gestellt.Hier die Antwort:We used the Head Of Chemistry at University Of East Anglia to oversee the characterisation of the NH3 and pH. The reason for this is the NH3 is so sensitive there is not an ‘accurate probe’ to compare it to so we used raw chemistry in buffers. Things like the Hanna stuff is not accurate enough as a reference device when you read the small print (as our most):- <a href="http://www.hannainst.co.uk/Manuals/93700.pdf" target="_blank">http://www.hannainst.co.uk/Manuals/93700.pdf</a> It seems like a number of Koi people use this for NH3 measuring. The key bit is below, an accuracy of +-0.040ppmThe obvious advantage of photometers is the tests are one off so they are not left in the water where things can affect them. We now do much of the testing in house for pH using reference and traceable buffers – the same things you would use to calibrate high quality probes to then the do the comparative tests. Independent reviews have been carried out, here is one. <a href="http://www.reefs.com/blog/2012/07/30/product-reviewseneye/" target="_blank">http://www.reefs.com/blog/2012/07/30/pr ... iewseneye/</a> Its also worth mentioning that new algorithms can be uploaded to the product through the internet so unlike other standalone products the seneye can be improved.Hope this helps. Kind regards Matt</blockquote>

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