From their webpage -
The Dexter Industries Thermal Infrared Sensor reads surface temperatures of objects. It is a non-contact thermometer based on the MLX90614. Detecting the infrared radiation from an object, the sensor can read object temperatures between -90°F and 700°F (-70°C and +380°C). The sensor has a high accuracy of 0.5°C and a resolution of 0.02°C.
The Thermal Infrared Sensor reads both the ambient temperature (the temperature of the air around the sensor) and the surface temperature of the object that the sensor is pointed towards.
The sensor can detect a flame at a range of 2 meters.
Xander has already done some cool things with his sensor, and I've just received mine, so stay tuned for a post about how I've tested it out.
How would you use this sensor? Feel free to add your thoughts in the comments.