Baker Instruments 312FC Magnetic Surface Thermometer, 0 to 250&deg;F (-20 to 120&deg;C) Temperature Range: 0 to 250F (-20 to 120C) Resolution: 2F/1C Accuracy: 2% of full scale Magnetic back Dimensions: 2" dia. x 1/2 h. (5.1 x 1.3 cm)