Incubation: egg temperature vs air temperature

[Pythonfriend]

this.

and choose which device to trust. the variance in temperature could be caused by an error in calibration. in choosing thermometers, i use an old school but high quality analog thermometer as reference. i only trust digital thermmos that read to within a half degree of the reference....i still use those that fail my test, but i add or deduct the noted variance to get actual temps.

that makes a lot of sense. oldschool analog thermometers with colored alcohol or even mercury (red/blue vertical line or silver vertical line in the glass tube) are awesome, especially when they are made for medical-grade or laboratory-grade precision. they are slow but precise.