The glass flow tube is made from mandrel drawn glass to ensure high accuracy, which allows interchangeability from flowmeter to flowmeter with {HEAD ~ no change} in {TAIL ~ accuracy} 
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The glass flow tube is made from mandrel drawn glass to ensure high accuracy , which allows interchangeability from flowmeter to flowmeter with { HEAD ~ no change } in { TAIL ~ accuracy }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL