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Air Duct Air flow rate (CFM) measurements, Tools, & data for buildings, air conditioners, warm air furnaces
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VYAIR 0.6 to 8.0 litres/minute DigiFlow 6100R Programmable Digital Mini Flow Totalizer (Count Up for Water Filter Systems with Multiple Cartridges) and Flow Rate Meter with 1/4" BSP Male Connections : Amazon.co.uk:
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Air Flow Rate Measuring 2" Pulse Output Oxygen Thermal Mass Flowmeter - China Oxygen Thermal Mass Flow Meter and Mass Air Flow Meter
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