The 9140 has a temperature range of 35 °C to 350 °C, and it reaches its maximum temperature in 12 minutes At six pounds, its small enough to easily carry in one hand Its truly a unique innovation in dry-wells The unit has a stability of ±0.05 °C or better and a uniformity of at least 0.4°C in the largest-diameter wells and 0.1°C in the smaller wells Despite its small size, this unit performs Use the display, calibrated to ±0.5 °C, as your reference, or use an external thermometer for maximum calibration accuracy With three removable inserts to choose from, the 9140 is as versatile as it is fast > Each Unit Includes RS-232 Interface Software Manufacturers NIST Traceable Certificate