MACHEREY-NAGEL92120, pH-Fix 4.5-10, Box of 100 Strips

I’ve tried six different kinds of strips. The inexpensive ones bleed indicator between pads, or into the solution once wet. ColorPhast and ph-Fix do not.All of the indicators that go through olive green, all brands, the color never matches the gauge, as if the gauge was created by someone red/green colorblind.These strips are the only ones readily available that can identify solutions between 5.0 and 7.0 quickly, without having to spend a lot of time figuring out indicator vs gauge differences, nor dealing with adjacent indications that are nearly identical.Note that most inducators have a difficult range (or two on the 0-14 strips) where two adjacent whole-number indications are almost the same. Always check the brand, style, etc photos to make sure what you are buying is easy to read in the primary range you work with. I found the 2.0-9.0, and 0-14 to be difficult to read, and many of the off-brands had the tough-spot right in the middle of my primary range.These look a little tough, but the gauge matches the indicators, so it is a very fast read compared to all of the others.

Works very well. Colors on chart and strips match well. (Best viewed by daylight, or something close.) Colors don't run, like some other brands. Needs more than the usual 15 seconds to fully develop colors, maybe 45 seconds... not an issue.

I needed an estimate of ph. This suited my purposes, for the money. If needed will buy again

I thought these were a little expensive. I got what I needed and they work for what I needed them for.

Accurate and wide enough so one strip can be cut longitudinally into three strips!

Der Aufpreis lohnt sich - besser erst nach 20 Sekunden ablesen.Ph Wert lässt sich mit etwas Übung auf 0.5 genau bestimmen. Test ist robust - wurde von mir mehrmals mit Pufferlösungen von -8C bis 35C geprüft.