INSTRUCTIONS: This gas meter is connected to hose to measure unidirectional gas MADE OF HIGH QUALITY ACRYLIC: Made of high quality acrylic, it is transparent and can hold up to 0.6MPa pressure IT IS SIMPLE TO USE: It is simple to use, and has 8mm barbs for convenient connection to hoses MEASURABLE GAS: Can measure furnace gas, coke oven gas, coal gas, air, nitrogen, acetylene, phosgene, hydrogen, natural gas, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine gas, methane, carbon dioxide, oxygen, compressed air, argon MAINLY USED FOR: Mainly used for detecting the oxygen flow, control oxygen and can be used in industry, Manufacturer: Hilitand