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Airflow Capture Hoods

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TST0660-TESTO 420 (0563 4200) AIRFLOW HOOD SET testo 420 - volume flow hood Product no. 0563 4200 Make sure you get the testo 420 volume flow hood for larger ceiling outlets and at the same time enjoy multiple maintenance benefits on HVAC systems. Because the flow hood with the removable measuring instrument is not only exceptionally light, it also guarantees accurate volume flow calculations at swirl outlets   Technical data Temperature - NTC Measuring range -20 to +60 °C Accuracy ±0.8 °C... Airflow meters