... tube. EFR laser power supply can be used for CO2 laser tubes 60w,80w,100w,130w,150w and 180w ... the service life of the tube;3. Power supply has a feedback port, which will be used ... -loop control and operating current checking.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 ...