<a href=showthread.php?s=&postid=6766788#post6766788 target=_blank>Originally posted</a> by goldeneyeretrie
I did not think resolution and accuracy(precision) were the same?
They aren't!
The info from Dr.'s Foster & Smith refers to resolution as accuracy, while the Pinpoint website specifically states resolution and mentions accuracy nowhere.
Furthermore, your equipment (
any equipment) is only as accurate as your calibration routines, which is why I dumped my Pinpoint gear in favor of Milwaukee in the first place, because I was sick and tired of not being able to trust my controllers and meters. Also, I was becoming really weary of having to replace the probes a couple times a year, because the suction cups released and the were completely submerged, or the power went out causing the sump to fill above the probe cap... Either way, it got old!
Also, if you read the info posted in the link bellow, you'll see that reviewer #3 lists the Pinpoint accuracy as being "+/-0.02 pH", yet again, this info is posted nowhere in American Marine's info (
website or user documentation).
http://www.premiumaquatics.com/Merc...OD&Product_Code=PIN-PH&Category_Code=Pinpoint
The beauty is that you're free to believe and buy whatever you want, but at least understand that there is likely a reason that the manufacturer isn't publishing their accuracy, but instead relying on resolution which means little to nothing if the accuracy is off.
FWIW: The Milwaukee SM105
does have a Resolution of 0.01 and an Accuracy of Ã"šÃ‚± 0.02 -- It is however quite a bit more expensive than what the average aquariast is willing to spend.
http://www.milwaukeetesters.com/english/products/professional_port_meters/SM105.html
On a final note; the chances of all of my controllers and monitors being off by precisely the same factor, would be pretty odd... With as many checks and balances as I have in place, the odds are definitely stacked in my favor!
This is what I used to have in place...
And this is what I have today...
