Here's a good article on calibrating thermometers.
https://www.backyardchickens.com/ar...incubator-thermometers-and-hygrometers.73634/
I use a meat thermometer to check against my cheapo digital ones as well.
https://www.backyardchickens.com/ar...incubator-thermometers-and-hygrometers.73634/
I use a meat thermometer to check against my cheapo digital ones as well.