Have you put them in ice water to see how close they are to 32 degrees?[COLOR=141823]Hope I'm doing this correctly. This is 4 1/2hrs into calibrating these two digital temp/hydro meters. Both are the acurite brands from walmart. One with a wire probe and one without. The one without seems to be exactly two degrees below the other one with both temp & humidity. It's also the slowest. The one with probe works a lot faster and seems to be right on or one below my oral thermometer when placed in warm water. Which should I rely on? Should I use both of these in the incubator and just stay in the middle of both readings? Both seem to be 7-10 off of what the humidity is suppose to be reading for this test, but i'll leave it in there a couple more hrs to be sure. So i'll just have to take note of how much its off when it's in the incubator.[/COLOR] [COLOR=141823]Im not sure how reliable these are, so should I just keep humidity reading between 20-40, and be fine? I know temp is more critical then humidity and since they are off by two, should I leave one temp at 100 and the other at 98? I have read that when using a fan (which I am) that it should be 99.5. I hate not knowing which thermometer to count on. Any thoughts? What would you do? Thanks[/COLOR]![]()