Bluelab KCl Storage Solution for pH Probes and Pens, for Maintaining, Hydrating, and Storing pH Meters, Made in The USA (120ml / 4.5 fl. oz)

This stuff is good. The One Pen from Blue Labs cost too much not to buy the best products to keep it working properly. This storage solution works. I will be buying more to keep my meter safe.

Excelente producto

I have used the Bluelab pen a number of times and this is what is recommended cleaning the PH probe and calibrating the PH pen.

Protect the test pen electrode，

Nice drop bottle. Wish the other solutions came in this instead of packets

If you have the BlueLab pH pen you need this. Used to store the pH pen, this solution keeps the pen tip hydrated and in calibration. Without storing properly the tip dries out and then your readings can vary or you may need to re-hydrate and recalibrate more often. I love the pen, and it’s too bad it needs the storage solution, but it sure helps with getting good consistent readings and results !!

Item is exactly as described, and shipped in a short time

I Don't Trust the Cap if I were to try and store it in a bag but no complaints seems high quality.