[wobdee]

So far so good, my cheap $20 meter is dang close to Brewers Friend calculator. Batch of Ofest was 5.49 with BF and the meter was 5.48.

[majorvices]

I dug out the instructions to my pH meter and it indeed does indeed say store in 4. Which makes me wonder where I got to store in 7 or distilled water?? Oh well, thanks for the heads up. I will be buying some storage solution too.

[S. cerevisiae]

PS: I really like the Milwaukee MW-101 and 102 meters because they use a double-junction, gel-filled probe that sure has provided years of life for me. That probe should always be stored in a KCl solution, not DI water or calibration solutions.

+1

I have owned several pH meters over the years, but the MW-101 is easily my favorite.  My probe lives in pH meter electrode storage solution.

[mabrungard]

Keith, I wrote about pH probe storage in a post on the Bru'n Water facebook page. It presents information direct from a major industrial pH equipment manufacturer and the recommendation is to use a potassium chloride storage solution.

There are manufacturers that recommend using distilled water to keep the bulb on their probe's moist, but that distilled water shouldn't be in contact with the bulb or it will osmotically draw the ions out of the probe's electrolyte. For that type of storage, you need to use just a couple of drops of distilled water in the probe cover and that creates the moist environment without the possibility of destroying the probe.