Bearing in mind one gauge is on the acc & the other running off the starter ignition.. So there is a slight delay in when they start assessing the temps..
Each separate gauge appears to follow each-other on both channels within about 1c maybe 1.5c of each-other taped to the kettle to about 86c... But i think it was fighting against the air flow running through the van with the door open?
Using a heat gun...

What with four channels sampling temps at different times it was hard fer me to keep track of what was going on...

All i can say is the new unit didn't start reading sub zero temps above 75... & my unit ties the temps up when strapped to the stubs...
If someone has two units that are programmed correctly, a controlled environment & more time? Feel free!

I've had enough...
