Easy to calibrate. It's push-button calibration is wa...y better than the screw-tip calibration design. Only takes a few seconds. After buying one, I bought several since none of these pH pens work for very long. Kissed a lot of frogs to find a pen that works, is dependable, and easy to calibrate.
Verified purchase: Yes | Condition: New
This is probably my 5th or 6th PH pen. This particular pen w...ould not calibrate and was locked at 5.7. Soaked it in distilled water, and attempted to calibrate it multiple times over 4 days but it was broken on arrival. I have purchased this particular model many times and have had great luck with them...but not this time. I now purchase self calibrating models so I will likely not try this type again.
Verified purchase: Yes | Condition: New
I was able to calibra...te the meter easily. The only bad thing I noticed was there is a small opening on the back of the meter. Only bad if you get any liquid in the meter, which I did and it then wouldn’t work correctly. After it was completely dried out, it calibrated just fine again.
Verified purchase: Yes | Condition: New
Looks good quality. Their was droplets of water... in it where is was tested or calibrated already.
Verified purchase: Yes | Condition: New
I did not even calibrate this and used it next to a f...ancy high dollar one a buddy has and it is within “0.40” ph reading of the same. I’m not sure which meter is closest to the perfect reading, but This one was also a 1/5 of the price and works. My buddy’s meter is submersible, which is nice to drop in water and walk away, but oh well.
Verified purchase: Yes | Condition: New