... ageing tests. EFR laser power supply can be used for CO2 laser tubes 60W,80W,100W,120W,130W,150W ... the lifespan of the laser tube.3. Power supply has a feedback port, which can be used ... the laser tube's operating current.4. Power supply itself has a protection while in open-circuit ... to avoid damaging the power supply when the laser tube leaks. Furthermore, the power supply's working lifespan will ...