HI 70300M Storage Solution for pH/ORP Electrodes, 230mL Bottle

I've ordered this before for use on my pH meter - they're expensive and well worth taking care of - and I've reordered it at least once, since, and will again, I'm sure. Excellent product!

The solution helped me store my tester and keep the sensors clean

It works like it should

Use it to store any of your pH or ORP electrode probes. It works, not much else to say. Most electrodes come with some type of sponge soaked with this solution but people don't replace it when they store the electrode. I use this for the sponge that comes with the pH probe electrode on my Hanna portable pH probe. Keeps yours electrode in good working shape.

This is the product that Hanna recommends for their HI 98121 combination pH/ORP meter so that's what I got. Whichever pH probe you have, use the solution the manufacturer recommends. 9 times out of 10 you can get away with a storage solution from someone else but at the price of pH meters you don't want to be that guy who was the 1 time in 10.

works fine. next time will order larger sizes though because this does not really last all that long. get larger size

We used these products because we had to do soil samples for a job, and they were great for that.

We use this, along with the Milwaukee Instruments Waterproof pH Tester to test the PH balance of products we sell. Both products have stood the test of time so we have no complaints so far.

Es Hana instruments