I sent in this question to Brinsea today, but since it will probably take them days to get back to me and because I value BYC-ers opinions, I'd love to hear of others' experiences with the Brinsea 20.
This is my first Brinsea. My new Brinsea 20 Advance has been holding a steady temp of 99.6 (37.5) per the digital readout. But when I use my Thermapen to check the temp, it reads 98.8 (37.1) just below the top of the dividing bars (egg level) which is as far as the Thermapen will reach through the venting hole. It does read 99.6 closer to the top where the clear plastic vents are. I've double-checked my Thermapen and it reading spot on.
Should I be concerned about the slightly low reading and should I program the temperature slightly higher to compensate? I haven't set my eggs yet but now I'm nervous.