Hanna InstrumentsHI73127 Polypropylene Spare Electrode with Pin Connection, 0 to 14 pH

Arrived and sat around for 90 days before installing in my pH probe. So simple, read 7.01 pH with my calibration solution which matched my expectation.

Great product worked good for both of my hanna instruments HI98127 ph meters.N8ce to be able to replace the probe rather than the whole unit.My first HI98127 is about 4 years old and the other is atleast 10 still going strong with new batteries and electrode

Wasn't dry when I got it.

Good price and quality for replacement part that extends the life of our digital pH tester/ thermometer. Easy to replace.

I read the reviews but needed this quickly. I was happy to receive a replacement that was still nice and moist, after calibrating it was like new again!

Spare arrived all dried out. I should have read other reviews who claim the same. I would not purchase from vendor again as this is old stock. Once the bulb dries it cannot be used for reliable PH measurement.

I only had to buy this because the HI98128 that I also bought from Amazon came to me dry and malfunctioning. And by the time I did anything about it, it was too late to return the unit. So I ordered this, and it also came to me dry but at least it's working after letting it sit in a storage solution overnight.My recommendation is to try to buy one locally if possible, and if you have to buy it from Amazon, test it soon after getting it so you can return it if needed.Also, you can buy the replacement tool if you want, but removing a dead electrode is pretty easy with good pliers, especially since you don't have to worry about damaging it since you're not going to keep it. Putting in the new electrode is fairly easy without pliers. I just did it with my hands and a ruler to twist it in to place.

exactly as described, works perfectly - A lot cheaper than replacing the entire meter!