Model CL3515R portable calibrator/thermometer with 4-digit LCD has an ergonomic rotary knob allowing one-handed operations and uses external K/J/T/E/R/S/N/L/U/B/C type thermocouples as temperature sensors. The thermometer features 2 channels for thermocouple temperature measurements (T1 and T2) with offset adjustment. Included is an NIST-Traceable calibration certificate with 13 data points, 2 free 900mm (36") type K insulated beaded wire thermocouple with subminiature connector and wire spool caddy. Also included are computer software, USB and RS232 Cable, and TAS transition adapter.