INSTRUCTIONS: This gas meter is connected to the pipe to measure one-way gas flow MEASURABLE GAS: Can measure blast 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 IT IS SIMPLE TO USE: Flowmeter is simple to use, and has 8mm barbs for convenient connection to pipes MAINLY USED FOR: Flowmeter is mainly used for detecting oxygen flow, controlling the flow of oxygen and can be used in industry MADE OF HIGH QUALITY ACRYLIC: Flow meter is made of high quality acrylic, it is transparent and can hold up to 0.6MPa of pressure Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store