HOW LONG DOES THE TUBE LAST?

The average lifespan of a tube is 1000-1500 hours IF ran at a max of 16mA for most of it's life. It's life will go down if you run constantly at it's max rating. CO2 laser tubes also have a shelf life. So make sure to only buy a replacement tube close to when you plan to install it, keeping it on a shelf for the future will only compromise it's life span. To measure your amperage going through your system. You go from the negative line of the tube and run it THROUGH your multimeter/ammeter and back out to the laser PSU. This will give you your amp usage. It will not hurt your multimeter either. Just be sure your connections are very snug since 20,000V is liable to arc very easily if a connection comes loose. Additional Information: what is life span of CO2 generator in videojet laser coding machineVJ3320