You Searched For: Bubblers
Bubblers are specifically designed to maintain an inert atmosphere within reaction systems. Since splashing is common, double, gas, horizontal, mineral oil, and nitrogen formats are safer than the traditional mercury fill. If the pressure builds to exceed that of the laboratory atmosphere, excess gas will travel down the tube, bubble, and eventually escape through the hood opening. If the pressure is less though, the contained liquid in bubblers will rise to stop additional air from entering.
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