Hanna 774 vs. Salifert PO4 tester

christiantt

New member
Hi RC.

I've just bought a Hanna 774 tester.
When I do the test with the Hanna I get a (high) result - 0.21
When I do a Salifert test it says around 0.02.

Why are there so much in difference?
 
Personally I find the Salifert very difficult to read @ low numbers.
I went with a Milwaukee digital unit for that very reason.
 
Did you get the Hanna Ultra low HI774 or the regular tester HI713. The ulta low is more accurate for our use.
 
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Personally I find the Salifert very difficult to read @ low numbers.
I went with a Milwaukee digital unit for that very reason.

I agreed on the Salifert. I'll take a look at the Milwaukee - thanks!

Did you get the Hanna Ultra low HI772 or the regular tester HI713. The ulta low is more accurate for our use.

I got the new 774. It's also ultra low and you get the result on the tester instead of having to calculate it afterwards :)
https://www.hannainst.com/phosphate-ultra-low-range-colorimeter-checkerr-hc-hi774.html
 
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