I thought my bulb thermometer was right and my electronic was wrong... BUT...

[superbeth98]

So I had a 4 degree difference between my bulb and electronic thermometers. Thought maybe the electronic was to blame. I bought another electronic, different brand, and it matches *exactly* what the original electronic thermometer says.

I guess the bulb one that came with my hovabator is wrong!? Everyone/everything I have seen says the bulb is the reliable one.

Thoughts?

 

[Dragons4u]

Stick the bulb one in a glass full of ice water. It should read 34 degrees after a couple minutes, if it doesn't you know its wrong.
Stick the electronic probe in a baggie and put that in ice water and it should read the same.

 

[superbeth98]

The bulb one doesn't go below 70 degrees (it's the one that came with the bator), but the two electronic ones I can test that way.

 

[Dragons4u]

Hrm, don't know then. If I can't do the ice test, I usually don't buy it.

 

[HatchCraft]

You can compare thermometers to a digital fever thermometer . I have found the digital fever thermometer to be fairly accurate or close enough for incubation. Heat an insulated cup of water ( fever thermometers won't register low temps) and compare temps.