Can anyone help with type of thermometer?

[chickenfried]

I have been reading on this site that you don't want to rely on the old stick thermometer, to use a digital thermometer / hygrometer. So I bought two at Wal-Mart it's a Springfield small white one put one in each incubator. Well after a couple of days I noticed that one hardly ever changed and the other one did so I decide to switch places. And then I got two different readings from what I had before the change.

So I bought an Acu-Rite one that had a wire and dropped it thru the hole in the top and set at the egg height and it reads different than the other two.

And it shows about a 2 degree change between an on & off & back on again on the heater. Any suggestions on which one is right or a better brand one to use?
Thank, You

Ron

 

[rebelcowboysnb]

None are likely to be accurate. The one with a probe you can drop in warm water an test it with a medical thermometer. Then put them all in one incubator an see how they match up to it.

To read humidity the whole thing has to be in the incubator.

 

[fishfarmer]

Do you have a fan in your incubator? That may be the reason for the temperature difference. I have three thermometer in my incubator. They are off about .5-1 degrees F (I leave them at next to each other at room temperature before using them in the incubator), but without the fan, the top thermometer reads 104, and the two lower thermometer reads 96 and 98. Even with my fan, there may be a 2 degree difference IF I don't set the fan blowing at an angle upward to get the heat spread out uniformly in my incubator.

 

[rebelcowboysnb]

did not think to ask about a fan or not.

Here is some info on how thermal layers form in a still air incubator.
http://cmfarm.us/stillair.html

 

[fishfarmer]

A lot of thermometer could just be off too.