I am trying to find a flowmeter that could accurately measure gaseous ketene flow at <0 oC and <200 mmHg vaccuum. Our current flowmeter is a venturi meter with a DP Xmitter. But because of ketene's reactive nature, the residue formed from it's self-polymerization plugs the taps leading to inaccurate readings. Does anyone know of a reliable flowmeter that could measure gaseous ketene within 1-5% accuracy and that could handle the reactive enviroment?
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