Sometimes I wonder if no meter might be better than two meters

[AnimalHouse]

I went thru this with pH meters too. Now my pH meter is the old school 3 drop test kit.

 

[BigBlonde]

The Ink Bird monitor can be calibrated. Can the other one be calibrated? If so, have you tried calibrating them side by side?

I use multiple sensors and they rarely have the same reading for anything. I'm not sure how important it is for them to be precise, though. I mostly watch for changes.