The JOFRA MTC-650A Compact is a portable Dry-Block temperature calibrator that provides precision Calibration temperatures from (33 to 650C) (91 to 1202F) for calibration of all types of temperature sensors. The MTC-650A Dry-Block design does not use any hazardous hot liquid and heats up and cools down much faster than traditional ways of calibrating temperature sensors on a vessel.