ChcknNurse
Songster
In the past, my first 2 Brinseas were spot on, any calibrated thermo I put in, matched. So, I trusted them. But my 3rd, is off by 3 full degrees (F). So, you should calibrate the extra thermo - if it is calibrated, then the Brinsea is off. But, Brinsea prides itself on their calibrated machines.
Again, your best bet would be calibrating your thermo....
Good luck!
I have 2 Brinsea Octagon. But, when I got my mini, the temp said 104. So, no, it may not be that simple. My first 2 were perfect, 3rd was a bust. I'm hoping you are running the other 2. If you are, confirm the temps in those with the thermometers. Then you have the confirmation. But, if you have the option, the Brinsea Spot Check thermometer is the best double check. I can always be confident.