I use this one from Amazon and purchased some buffers as well. It’s not my favorite meter but it gets the job done, and what’s more is you can use it to measure the ph of creams and gels too instead of just normal liquids. This saves you from having to take your sample and dilute it in a smidge of water to find the ph, which, since I mostly measure acids, I find that can fudge the real numbers.
If you're willing to spend some money, a meter is a lot more accurate and easier to read. Extech makes a decent entry level meter.
Let's see...nope, we use the pH100 model, works just fine.
I've tried quite a few, the best I've found for the money is the Extech 100