I have the Accurite therm in the bator (air temp) and a coralife brand thermometer in the weasel. The Accurite says the air temp is 102, the coralife says the weasel temp is 98.8. I DON'T KNOW WHAT TO BELIEVE!!! I threw away the alcohol thermometer that came with the incubator because it was saying 120, and I realized the glass part had come separated from the plastic card with the numbers... and so was not lined up anymore. Sheesh!