The Hart Scientific 9103 covers below-ambient temperatures as low as Tone25C. The 9103 is stable to Tone0.02C, and its display is calibrated to an accuracy of Tone0.25C at all temperatures within its range. 0C is reached in just eight minutes, and 100C is reached in six minutes, so your time is spent calibratingTonenot waiting.

The 9103 reaches temperatures 50C below ambient, so Tone25C is reached under normal ambient conditions. Hart 9103 competitors like to advertise their units as reaching Tone45C when they really mean Tone45C below ambient, which typically means it will go to Tone20C. The 9103 doesnTonet require you to work in a walk-in freezer to achieve its full advertised range.