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The 9103 covers below-ambient temperatures as low as -25 °C. The 9103 is stable to ±0.02 °C, and its display is calibrated to an accuracy of ±0.25 °C at all temperatures within its range. In just eight minutes, 0 °C is reached, and 100 °C is reached in six minutes, so your time is spent calibrating-not waiting. The 9103 reaches temperatures 50 °C below ambient, so -25 °C is reached under normal ambient conditions. Our competitors like to advertise their units as reaching -45 °C when they really mean -45 °C below ambient, which typically means it will go to -20 °C. Our unit does not require you to work in a walk-in freezer to achieve its full advertised range. Choose one of three removable inserts sized for probes from 1/16 inch to 1/2 inch in diameter. Insert A handles a full range of probe sizes with a single well of each size. Insert B features two wells each of 3/8, 1/4, and 3/16 inches in diameter for doing comparison calibrations. Insert C has six 1/4-inch-diameter wells for multiple probe calibrations, and Insert D has three pairs of metric sized wells.