The North Jersey Media Group provides excellent food safety information in an article titled, "Take your food’s temperature correctly". The article, which was published on June 18th, highlights a Good Housekeeping Research Institute study, and shows the result of tests conducted on food thermometers:
The Good Housekeeping Research Institute tested 17 new kitchen thermometers. Three samples of each were evaluated by checking their precision in measuring the temperature of ice water and the temperature of boiling water. The best of the bunch were then assessed for their accuracy in measuring the temperature of roast beef and for their ease of use.
In general, digital thermometers proved to be more accurate than analog. And although remote thermometers might be convenient, they tended to be slightly more difficult to use. So before making a purchase, consider your cooking needs and match them against each thermometer’s distinctive features.