Quick question about mercury thermometer

[bigspringshatchery]

I just installed a digital thermostat on my cabinet bator. Its reading 99.6-99.8 I have 3 digital thermometers and on reads 100.6, 99,and 99.5 but the mercury one reads about 102-104. Could it be off since all the other ones are around the same?

 

[tellynpeep]

Yep; it could be off. I'd go with the 3 out of the 4 being closer to correct. Or you could get a fifth!

 

[tigercreek]

Or, you could take it out, clean itand stick it in your mouth and see if it reads 98.6. .........stan