A thermometer designed for use inside a microwave oven, made without metal parts that would spark or distort the electromagnetic field. Typically constructed from glass, plastic, or fibre-optic materials, it allows cooks to monitor the internal temperature of food during microwave cooking or reheating. Accurate temperature checking matters because microwaves heat unevenly, and visual cues are unreliable. The thermometer confirms that food has reached safe temperatures throughout, particularly important for reheated meats and ready meals. After cooking, a conventional probe thermometer can verify temperatures, but only a microwave-safe design can remain in the oven during operation.