To monitor grill temperature from a distance, the Fluke 62 infrared thermometer does a great job. Covered with a protective rubber boot, this rugged IR thermometer can take some rough treatment.
This thermometer can sense temperatures over a wide range...from minus 40 to 1400 degrees Fahrenheit (-40 to 760 degrees Celsius). It can be used in a variety of industrial situations, as well as for foods and cooking. This unit is designed with enhanced optics that allow you to measure the temperatures of smaller objects that are farther away.
Included with the thermometer is a nylon holster for handy storage and quick access. Fluke makes high quality test equipment, and this device is no exception.