A sensor for measuring the temperature of the utensil is an infrared sensor arranged at a location of the utensil such that it can receive the infrared radiation emitted by the heating surface, the sensor being connected to an electronic circuit capable of converting the variation in the infrared radiation...http://www.google.com/patents/US5934181?utm_source=gb-gplus-sharePatent US5934181 - Cooking utensil comprising a sensor for measuring the temperature of this utensil
