Metcal SMTC-139 Cartridge, Tunnel, SOP-28SmartHeatSmartHeat Technology is unique in that it senses the specific thermal demand directly at the solder pad and delivers the precise quantity and flow of thermal energy during both flux activation and intermetallic bonding phases without any adjustment and calibration. SmartHeat is radically different and provides users the only fully safe and thermally effective lead free soldering solution.Conventional technology senses and responds to the tip temperature and not the thermal energy demand of the solder joint and users are required to calibrate their systems regularly. In todays lead free environment, the conventional technology is thermally inefficient to produce good quality solder joints consistently and leaves process control in the hands of the individual operators.Conventional Soldering IronsMetcal SMARTHEAT TechnologyGood quality joints are a result of precise quantity and flow of thermal energy and not tip temperature. Fixed temperature cartridges and tips offer users a fully safe and thermally effective solution to their lead free soldering needs as well as complete process control. Furthermore, fixed temperature cartridges and tips can offer better tip life because they can operate at a lower temperature than conventional technology.The table below provides an overview of applications and maximum tip temperatures: