Metcal ps 900 production soldering system metcal ps 900 the ps 900 production soldering system is powered by smartheatreg technology and is part of a new generation of cost effective soldering systems from metcal it packs plenty of power and provides exceptional thermal control in a small benchtop footprintthe metcal ps 900 helps to increase productivity by performing a wide range of applications it is designed for lead free soldering processes multilayer boards and thermally demanding