Method of manufacturing a flowmeter for the precision measurement of an ultra-pure material flow

Abstract

A method of manufacturing a Coriolis flowmeter for the measurement of a process material requiring an ultra high level of purity. This is achieved by forming the entire flow path of the Coriolis flow meter from a PFA plastic material that does not transfer ions from the Coriolis flowmeter to the process material flowing through the flowmeter.

1 . A method of manufacturing a Coriolis flowmeter; said method comprising the steps of: 
 coupling a flow tube to a base, wherein said flow tube is formed entirely from a material that does not release deleterious ions into a substance flowing through the flowmeter and where said flow tube is configured to vibrate along a length of said flow tube where the length of said flow tube is defined from where the flow tube is coupled to said base at a first location to where the flow tube is coupled to said base at a second location;    affixing a driver to said length of said flow tube;    coupling a pick-off sensor to said length of said flow tube.    
     
     
         2 . The method of manufacturing a Coriolis flowmeter of  claim 1  where the material is selected from the group: perfluoroalkoxy copolymer (PFA) or polytetrafluorethylene (PTFE).