Review on Accurate Multi Parameter Calibration with Apera Instruments AI413: Maximize Precision and Efficiency by David Reyes

I went through a few PH meters from Hannah. My biggest issue with Hannah sensors is that replacement sensors are very expensive. I decided that instead of swapping out the temp and pH probes for nearly $100 each, I would just try a new brand. It has three point calibration and reads much faster than the two Hannas I had. The case it came in was also very nice and easy to use solutions while in the case it helped hold solution bottles. Calibration is fairly easy and measuring is a breeze with a smiley face when stable. It's been a few weeks and so far so good!