Use of Coiled Capillaries in a Convenient Laboratory Flowmeter

With coiled capillaries the basic simplicity of the Hagen‐Poiseuille flow equation can be retained at flow rates which are not achievable with straight capillaries. This fact lends itself to the design of flow metering systems (for liquids or gases) which appear to be intrinsically more reliable and accurate than many other types of systems, and which require only commonly available laboratory apparatus. One such metering system for gases is briefly described.