Philidelphia Instruments sells lab-grade thermometers and hygrometers at reasonable prices, check them out. This has been an awful hatching season for most of us that I have been in contact with. Our production was about a third of what it should have been. So many clear eggs and fully developed eggs not hatching is across the board and late hatches are baffling. I had a few peachicks hatch out on day 32 and 33 and many that pip and not zip, those are the ones I had to tape the toes and work on the legs. Lowering my humidity in the incubator to 40% fixed the rough navels but the rest of the problems remain.