If you are cooking a large whole animal, you have to keep track of both the internal meat temperature and the temperature at which the meat is cooking (ambient temperature).
If you are using an oven or enclosed cooker or smoke, you will probably have a thermometer that will give you the ambient cooking temperature (although these are usually not very very accurate and are taking readings from higher in the cooker and not at the level of the meat).
One solution to this is to use one thermometer that can be inserted into the meat for constant monitoring of internal temperature and that also can read the ambient temperature through a sensor on the back of the dial.
Bost readings are visible on the front of the dial so at a glance you can see both.
Handy little tool, very useful, for not much money.
Product Code: DUAL-SENSOR-THERMOMETER