Which one should I believe?

Also when I recalibrate all my probes they each get their own packets and after they all are calibrated I play and test each packet to each monitor. Always the same unless I use ph4 and 7 on one for a ca rx.
 
Mike, remind before the 19th auction, I have a TM thermometer, super accurate. You can borrow to check/calibrate your stuff. I found most Digi are off and need to be calibrated.
 
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