This Professional Grade IR Laser Thermometer accurately measures the surface temperature of a melted liquid (it is very important to agitate the liquid prior to taking temperature). Temperature Range: -40º to 428º F. Laser: Built in for Easy Aim Measurement Size: 12" Away - Measures 1" Temperature Range: -40º to 428ºF Display: Amber Back-Light LCD, Select ºC or ºF, Auto Off Power: 1 9 volt Battery included.