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![TSI 4046 and 4146 Flowmeter](https://images.findtheneedle.co.uk/findtheneedle/products/4752844.jpg)
Flow calibrators are used to adjust and measure the flow rate of air sampling instruments. Models 4146 and 4046 are portable, battery-operated units that are lightweight and easy to use..
For more information on TSI 4046 and 4146 Flowmeter talk to BSRIA Instrument Solutions
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