Covers below-ambient temperatures as low as 25 degrees Celsius. The 9140, weighing only 2,7 kg, has a temperature range of 35 degrees Celsius to 350 degrees Celsius and reaches its maximum temperature in 12 minutes. Lightweight and very portable. Accuracy to 0.25 degrees Celsius. RS-232 and Interface-it software included. Insert B features two wells each of 3/8, 1/4, and 3/16 inches in diameter for doing comparison calibrations.