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LZB -2, glass rotameter flow meter with control valve for water/air/gas/liquid (1-10ml/min for liquid) - - Amazon.com
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Rotameter - glass level gauge,magnetic float level indicator,level sensors and controls, flow meter, flow transmitter, pressure transmitter, pressure gauge
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Dwyer® Variable Area Glass Flowmeter, VA1043, Glass Float, 65mm, 0.104 SCFH Air, Al Frame & Fittings: Amazon.com: Industrial & Scientific
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