CALIBRATOR The 9140 has a temperature range of 35 C to 350 C, and it reaches its maximum temperature in 12 minutes. At six pounds, it’s small enough to easily carry in one hand. It’s 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. Specifications Range    35 to 350 °C (95 to 662°F) Accuracy    ±0.5 °C (holes greater than 1/4" [6.35 mm]: ±1 °C) Stability    ±0.03 °C @ 50 °C  ±0.05 °C @ 350 °C Well-to-Well Uniformity    ±0.1 °C between similarly sized wells Heating Times    12 minutes from ambient to 350 °C Cooling Times    15 minutes from 350 to 100 °C Stabilization Time    7 minutes Immersion Depth    124 mm (4.875") Inserts    Insert A, B, C, or D included (specify when ordering) Outside Insert Dimensions    31.8 mm dia. x 124 mm (1.25 x 4.88") Computer Interface    RS-232 included with free Interface-it software (Model 9930) Power    115 VAC (±10 %), 4.4 A or 230 VAC (±10 %), 2.2 A, switchable, 50/60 Hz, 500 W Size (WxHxD)    152 x 86 x 197 mm (6 x 3.375 x 7.75 in) Weight    2.7 kg (6 lb.) NIST-Traceable Certificate    Data @ 50 °C, 100 °C, 150 °C, 200 °C, 250 °C, 300 °C, and 350 °C Features: Range: 35 °C to 350 °C Accuracy: ± 0.5 °C (holes greater than 1/4" [6.35 mm]: ± 1 °C) Heating Time: 12 minutes from ambient to 350 °C Cooling Time: 15 minutes 15 minutes from 350 °C to 100 °C Lightweight and very portable RS-232 and Interface-it software included Easy to recalibrate