Meat Thermometer or Polder
A polder, or meat thermometer is particular useful for larger cuts of meat such as pork shoulder and whole chickens and turkeys.
Electronic polders are instant-read and there are versions that allow you to leave the probe in the meat and read the temperature constantly with the device next to the grill, or even inside your home using wireless technology.
In fact, some even allow you to set alarms that will go off when the meat reaches the desired temperature, ideal for big gatherings and parties when you are busy serving appetizers and drinks!
When using a thermometer or polder, be sure to insert the probe into the center of the meat and avoid touching bones as this will effect the reading.
Generally you want the internal temperature to reach about 165 degrees for poultry and pork. Beef or lamb which are generally served rare or medium-rare can be cooked to 140 degrees. Larger cuts of meat will rise in temperature a few degrees during resting.
Thermometer and polder's can be found at higher-end grocery stores, hardware stores or specialty BBQ shops, as well as online here.