Apera Instruments AI1114 pH Calibration Solution Kit (7.00, 4.00), 16 oz. for Each, Plus Apera CalPod Solution Holder, NIST traceable

Worked well, easy to use, fast shipping

I bought this kit of the 4 cal, 7 cal, and CalPod mostly for the CalPod. I like that calibration solution can be added for use that can then be sealed off to keep for a short period of time as well as be a nice modular solution holder to make calibration easier. I looked around to just buy the CalPod, which I could only find for ~20 at the cheapest. So, I bought the kit to get some calibration solution and the pod. It comes with some little labels for more than just pH, which is nice because I also wanted to do some EC calibration.

I bought this particular calibration solution because I have an Apera probe, I'm not really sure it makes a difference who's solution you use but I'll say....I'm glad I did. The quad holder was not something I knew I was getting with this "kit" but how much more convenient could it possibly be?? It also works perfect for the TDS probe, everything I need in one nice little tray!!!

The 4.0 fluid needs refreshed often. Won’t calibrate my pH meter to 4.1 except on first calibration of the day.

Got this to calibrate my pH meter for the pool.

I love it keeps all needed items close at hand. Works well for what it is. Happy to pay purchase price for that, the added calibration solutions are just a bonus in my opinion! Accurate with my blue lab meters with no issues! Thanks guys!

This is perfect, it makes calibrating a breeze! I calibrate before every use, no spills, no waste, 100% accuracy.

Works great for calibrating my blue labs pen at a fraction of what they sell theirs for.