33 to 350 degrees Celsius (91 to 662degrees Fahrenheit) Lightweight, portable, and fast. Cool to 33 degrees Celsius in 32 minutes and Heat to 350 degrees Celsius in 5 minutes. Built-in two-channel readout for PRT, RTD, thermocouple, 4-20 mA current. True reference thermometry with accuracy to plus or minus 0.01 degrees Celsius. On-board automation and documentation. Metrology performance in accuracy, stability, uniformity, and loading. Insert A: 3/8”, Two ¼”, 3/16”, 1/8”