I don't care what their site says, it is a common mistake. All one has to do is call HACH,
one of the worlds leaders on these units an ask the guy that designs and makes them. He
will tell you no. It is not that they won't work, there are no std's to judge them buy.
More than likely a conversion number will be needed to calculate in, to adjust for
seawater. That's what they asked me to do when I asked about their Nitrate photometer a
few years back. You need a known concentration and tested at different salinities, to see
how it is skewed. I never did it, as they wanted me to BUY the meter to run the tests !!!!
Saying a meter or test kit works and showing it actually does are two different things.
Some companies make CO2 kits and say that they work in SW, which is absolute BS and I
proved that :-) You have to remember that these units work off of light and light does not
travel the same way in seawater as FW. Think refract and how they are off 1 unit to low
right out of the box. The are calibrated to NaCl, which is not NSW. NSW has a higher RI
(Refractive Index) than FW. Here is an updated std Randy and I worked on

If you want an S=35 standard for refractive index, try 3.65 weight percent NaCl in water


NOTE;

It is not 3.5 but 3.65. A 3.5 would be for pure NaCl, how the meter comes in the box
-
Boomer

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If You See Me Running You Better Catch-Up
"CapFusion" CapeFussion...@hotmail..,com wrote in message
...
:
: "Boomer" wrote in message
: ...
: "I have been seriously considering this one:"
:
: I wouldn't, as there are NOT accepted for seawater. These are FW
: photometers and the high
: salinity of seawater skews the results. Known has ever done anything on
: any of these units
: and compared to NSW with, a known concentration.
:
:
: How interesting though, Boomer. It is funny when you mention this
: "photometer" are FW meter but according to their site, it statement focus on
: sea critter for aquaculturing. Since I do not have any experience with this
: meter nor can I ever to afford it. But Boomer, do you have experience or use
: with this meter?
:
: CapFusion,...
:
: