... the service life of tube. EFR laser power supply can be used for CO2 laser tubes 60w,80w,100w,130w,150w and ... so as to avoid damaging the power supply when the laser tube leaks. Furthermore, the power supply's working lifespan will ... achieve to 90% of Pre-set currentControl PortTTL Level switch to control, Effective level, to choose high/lowwithstand voltageinput - output, input - shell ...