For those reading this post--not directed at HugHess but a general audience post:
If a person does not have an extra meat thermometer with a probe(I could not give mine up for a month) The Brinsea Sport check will cost about the same and it has a probe. It is .1 accurate for temperature too.
We can go out and buy a lot of general purpose things that will work. Incubating is common enough now that we do not need to do that though. We can buy equipment and accessories that are made for incubating--They often work better for that purpose too. Incubator warehouse is a great source as well as the GQF store and Brinsea direct. Another example is candling. We can buy a $40.00 flashlight from amazon or walmart(some are less expensive but not as good) but the brinsea occuview candlers are made for candling and do not cost that much more. I have had mine for more than two years. If it were a regular flashlight someone in my family would have broken it or lost it by now.
I have made candling videos using by occuview high intensity--even with marans eggs--and you can see stuff with it!
This is from last year: