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● The hood features a unique flow straightener, which significantly improves measurement accuracy, saving you valuable time on difficult tasks ● The testo 420 control unit can be tilted for a more convenient view of the display ● The included Bluetooth / app feature allows for wireless connection to mobile devices, for remote monitoring, as well as remote operation ● The testo 420 app can send measurement reports directly from the work site via email ● For additional convenience, there is an optional tripod when working with high ceilings, as well as four additional flow hood sizes available for complete versatility ● The testo 420 is also a CEC approved air flow capture hood
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