It is hardly possible to measure small gas flowrates using mechanical flow meters if, simultaneously, a low measurement uncertainty is to be attained. The novel drum design of a miniaturized drumtype gas meter of PTB allows gas flows of down to 1 ml/min to be determined simply and accurately, independent of the type of gas used. The novel design of the drum allows more accuracy than traditional designs and is not expensive. The novel drum-type gas meter can also be used where small gas quantities have to be accumulated over longer periods of time (creep flow volumes).
rainer.kramer