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Us308mt Usn-hs10pb 10mm Od 0.3-10l/min Flow Sensor Flow Meter Totalizer Flow Rate Display With One Output Relay 12v 0.5a Max - Flow Meters - AliExpress
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Totalizer Input/Output Flow Monitor/Controller - Display Readout, 0-5Vdc/0-5Vdc RS-232 Interface (GC Series)
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