From 35 Watt Flowing Gas CO2 Laser Tube Kit.PDF
For the gas supply you will need a suitable high pressure bottle of CO2 Laser Mix (Mixture 9.5% CO2, 13.5 % N2, and 77 % HE), a regulator for same with both high and low pressure gauges, and an adjustable flow meter that has a scale of at least 0 to 4 Liters Per minute. All of these items can be purchased from any good welding supply shop. Some can even mix the gases on site, but most will send out your bottle for filling to the required.mixture. Be sure to also ask if they have generic CO2 Laser Mix. Sometimes they carry CO2 Mix on hand that is very close to the percentages above and should be used if available. If they do not have any pre-mix, just have the bottle filled according to the percentage above.